Publications
2022 |
Soave Elia; D'Elia Gianluca; Cocconcelli Marco; Battarra Mattia Blind deconvolution criterion based on Fourier–Bessel series expansion for rolling element bearing diagnostics (Journal paper) Mechanical Systems and Signal Processing, 169 (108588), 2022, ISSN: 08883270. (Abstract | Links | BibTeX | Tag: Battarra M., Cocconcelli M., D'Elia G., Soave E.) @article{Soave2022, title = {Blind deconvolution criterion based on Fourier–Bessel series expansion for rolling element bearing diagnostics}, author = {Soave Elia; D'Elia Gianluca; Cocconcelli Marco; Battarra Mattia}, doi = {10.1016/j.ymssp.2021.108588}, issn = {08883270}, year = {2022}, date = {2022-04-15}, journal = {Mechanical Systems and Signal Processing}, volume = {169}, number = {108588}, abstract = {In the last years, Blind Deconvolution methods demonstrated their effectiveness for the diagnostics of rotating machines through the extraction of impulsive signatures directly from noisy observations. Recently, in this scenario the explicit combination between Blind Deconvolution and cyclostationary theory strongly improved the fault detection ability of this diagnostic tool. This work presents a novel criterion based on the Fourier–Bessel series expansion instead of the common Fourier transform. This idea comes from the comparison between the mathematical nature of the Fourier–Bessel and the Fourier series, based on modulated and constant amplitude sinusoidal functions, respectively. The two criteria are compared through the analysis of both simulated and real vibration signals of faulty bearings. The results highlight the ability of the proposed criterion to detect the fault-related source with a lower number of characteristic cyclic frequency harmonics, strongly reducing the computational time required by the algorithm. }, keywords = {Battarra M., Cocconcelli M., D'Elia G., Soave E.}, pubstate = {published}, tppubtype = {article} } In the last years, Blind Deconvolution methods demonstrated their effectiveness for the diagnostics of rotating machines through the extraction of impulsive signatures directly from noisy observations. Recently, in this scenario the explicit combination between Blind Deconvolution and cyclostationary theory strongly improved the fault detection ability of this diagnostic tool. This work presents a novel criterion based on the Fourier–Bessel series expansion instead of the common Fourier transform. This idea comes from the comparison between the mathematical nature of the Fourier–Bessel and the Fourier series, based on modulated and constant amplitude sinusoidal functions, respectively. The two criteria are compared through the analysis of both simulated and real vibration signals of faulty bearings. The results highlight the ability of the proposed criterion to detect the fault-related source with a lower number of characteristic cyclic frequency harmonics, strongly reducing the computational time required by the algorithm. |
Guerra Davide; Battarra Mattia; Mucchi Emiliano Kinematics and geometrical admissibility conditions of balanced vane pumps with twin lip vanes (Journal paper) Mechanism and Machine Theory, 167 (104534), 2022, ISSN: 0094114X. (Abstract | Links | BibTeX | Tag: Battarra M., Guerra D., Mucchi E.) @article{Guerra2022, title = {Kinematics and geometrical admissibility conditions of balanced vane pumps with twin lip vanes}, author = {Guerra Davide; Battarra Mattia; Mucchi Emiliano }, editor = {Mechanism and Machine Theory}, doi = {10.1016/j.mechmachtheory.2021.104534}, issn = {0094114X}, year = {2022}, date = {2022-01-14}, journal = {Mechanism and Machine Theory}, volume = {167}, number = {104534}, abstract = {The present work is devoted to analyze the kinematics of twin lip vanes adopted in balanced vane pumps. The work provides the analytical description of the vane motion according to its geometrical parameters and the cam ring profile. Attention is given to the duality of the solution, an intrinsic property of twin lip vanes that may be considered as followers with two symmetrical half-circular tips. Based on the linkage kinematics, the analytical dissertation is further deepened to define the geometrical admissibility of the vane design and its mathematical domain. In order to evaluate the proposed approach, an extended parametric study is performed on the basis of the Buckingham theorem, detailing how the twin lip configuration affects the machine kinematics. Additional calculations are proposed to determine the vane design configurations that satisfy the fundamental law of cam design and to highlight how this requirement dramatically reduces the subset of available choices in presence of cam ring with a precompression profile. Finally, design guidelines are proposed in order to overcome these drawbacks and expand the admissibility domain.}, keywords = {Battarra M., Guerra D., Mucchi E.}, pubstate = {published}, tppubtype = {article} } The present work is devoted to analyze the kinematics of twin lip vanes adopted in balanced vane pumps. The work provides the analytical description of the vane motion according to its geometrical parameters and the cam ring profile. Attention is given to the duality of the solution, an intrinsic property of twin lip vanes that may be considered as followers with two symmetrical half-circular tips. Based on the linkage kinematics, the analytical dissertation is further deepened to define the geometrical admissibility of the vane design and its mathematical domain. In order to evaluate the proposed approach, an extended parametric study is performed on the basis of the Buckingham theorem, detailing how the twin lip configuration affects the machine kinematics. Additional calculations are proposed to determine the vane design configurations that satisfy the fundamental law of cam design and to highlight how this requirement dramatically reduces the subset of available choices in presence of cam ring with a precompression profile. Finally, design guidelines are proposed in order to overcome these drawbacks and expand the admissibility domain. |
2021 |
Gabrielli Alberto; Battarra Mattia; Mucchi Emiliano A Critical Analysis of Finite-Element Modeling Procedures for Radial Bearing Stiffness Estimation (Journal paper) Mathematical Problems in Engineering , 2021 (9955398), 2021, ISSN: 1024123X. (Abstract | Links | BibTeX | Tag: Battarra M., Gabrielli A., Mucchi E.) @article{2021c, title = {A Critical Analysis of Finite-Element Modeling Procedures for Radial Bearing Stiffness Estimation}, author = {Gabrielli Alberto; Battarra Mattia; Mucchi Emiliano}, doi = {10.1155/2021/9955398}, issn = {1024123X}, year = {2021}, date = {2021-08-30}, journal = {Mathematical Problems in Engineering }, volume = {2021}, number = {9955398}, abstract = {Different strategies are commonly employed by researchers in order to decrease the computational effort associated with the finite-element analysis of rolling-element bearings. The purpose of this work is to review and analyze the procedures and hypotheses that may be exploited to evaluate the nonlinear radial stiffness of these components. Techniques are utilized to develop a meshing procedure aimed at balancing the computational effort and the accuracy of the results, to define a robust approach to the problem. The geometry is reduced by taking advantage of the available symmetry planes, by removing unloaded rollers, and by substituting the shaft with an equivalent sinusoidal load. In addition, the element dimensions are adapted to the applied load depending on the size of the contact area as computed by means of the Hertz theory. The proposed methodology may be applied to all bearing types provided that symmetry conditions and contact area dimensions are properly assessed. The estimated stiffness is compared against analytical formulae retrieved from the literature. Influence of different element types, roller position, cage, and clearance on accuracy and computational time is discussed. }, keywords = {Battarra M., Gabrielli A., Mucchi E.}, pubstate = {published}, tppubtype = {article} } Different strategies are commonly employed by researchers in order to decrease the computational effort associated with the finite-element analysis of rolling-element bearings. The purpose of this work is to review and analyze the procedures and hypotheses that may be exploited to evaluate the nonlinear radial stiffness of these components. Techniques are utilized to develop a meshing procedure aimed at balancing the computational effort and the accuracy of the results, to define a robust approach to the problem. The geometry is reduced by taking advantage of the available symmetry planes, by removing unloaded rollers, and by substituting the shaft with an equivalent sinusoidal load. In addition, the element dimensions are adapted to the applied load depending on the size of the contact area as computed by means of the Hertz theory. The proposed methodology may be applied to all bearing types provided that symmetry conditions and contact area dimensions are properly assessed. The estimated stiffness is compared against analytical formulae retrieved from the literature. Influence of different element types, roller position, cage, and clearance on accuracy and computational time is discussed. |
Polastri Marco; Storchi Gabriele; Battarra Mattia; Montorsi Luca; Milani Massimo; Mucchi Emiliano A lumped parameter approach for the filling analysis of V6 engine lubrication systems (Journal paper) Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 236 (1), pp. 29-39, 2021. (Links | BibTeX | Tag: Battarra M., Milani M., Montorsi L., Mucchi E., Polastri M., Storchi G.) @article{, title = {A lumped parameter approach for the filling analysis of V6 engine lubrication systems}, author = {Polastri Marco; Storchi Gabriele; Battarra Mattia; Montorsi Luca; Milani Massimo; Mucchi Emiliano}, doi = {10.1177/09544070211018877}, year = {2021}, date = {2021-05-21}, journal = {Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering}, volume = {236}, number = {1}, pages = {29-39}, keywords = {Battarra M., Milani M., Montorsi L., Mucchi E., Polastri M., Storchi G.}, pubstate = {published}, tppubtype = {article} } |
Francesco Pizzolante, Mattia Battarra, Gianluca D'Elia, Emiliano Mucchi A rattle index formulation for single and multiple branch geartrains (Journal paper) Mechanism and Machine Theory, 158 (104246), 2021, ISSN: 0094114X. (Abstract | Links | BibTeX | Tag: Battarra M., D'Elia G., Mucchi E., Pizzolante F.) @article{Pizzolante2021, title = {A rattle index formulation for single and multiple branch geartrains}, author = {Francesco Pizzolante, Mattia Battarra, Gianluca D'Elia, Emiliano Mucchi}, doi = {10.1016/j.mechmachtheory.2021.104246}, issn = {0094114X}, year = {2021}, date = {2021-04-01}, journal = {Mechanism and Machine Theory}, volume = {158}, number = {104246}, abstract = {The paper proposes an analytical procedure for the generalization of the rattle index in any type of ordinary transmission layouts, single or multiple branch, both in idle and loaded conditions. Its definition is obtained by a recursive analytical formulation of the rotational dynamics of gears. Numerical analytical studies are exploited to examine the effectiveness and reliability of the introduced index. Several geartrain layouts are investigated and results show its capability to instantaneously describe the vibro-impact events related to any gear pair of the driveline. Moreover, the general definition is shown to be a proper indicator of the potential presence of mutual interactions between different gear pairs pertaining to the same driveline. The analysis of the results reveals an excellent agreement with the expected behavior of the outlined parameter}, keywords = {Battarra M., D'Elia G., Mucchi E., Pizzolante F.}, pubstate = {published}, tppubtype = {article} } The paper proposes an analytical procedure for the generalization of the rattle index in any type of ordinary transmission layouts, single or multiple branch, both in idle and loaded conditions. Its definition is obtained by a recursive analytical formulation of the rotational dynamics of gears. Numerical analytical studies are exploited to examine the effectiveness and reliability of the introduced index. Several geartrain layouts are investigated and results show its capability to instantaneously describe the vibro-impact events related to any gear pair of the driveline. Moreover, the general definition is shown to be a proper indicator of the potential presence of mutual interactions between different gear pairs pertaining to the same driveline. The analysis of the results reveals an excellent agreement with the expected behavior of the outlined parameter |
Natali Caterina; Battarra Mattia; Mucchi Emiliano A critical review on FE-based methods for mesh stiffness estimation in spur gears (Journal paper) Mechanism and Machine Theory, 161 (104319), 2021, ISSN: 0094114X. (Abstract | Links | BibTeX | Tag: Battarra M., Mucchi E., Natali C.) @article{2021d, title = {A critical review on FE-based methods for mesh stiffness estimation in spur gears}, author = {Natali Caterina; Battarra Mattia; Mucchi Emiliano}, doi = {10.1016/j.mechmachtheory.2021.104319}, issn = {0094114X}, year = {2021}, date = {2021-03-27}, journal = {Mechanism and Machine Theory}, volume = {161}, number = {104319}, abstract = {Several methodologies for the mesh stiffness calculation in spur gears have been found in the literature, in the last decades. Based on a bibliographical analysis and the research activities of the authors, attention has been devoted to three methodologies, which appeared as the most employed and cited. A critical review of such methodologies, FE-based method, hybrid analytical-FE method, and analytical approach, has been undertaken, highlighting some crucial aspects regarding the mesh stiffness estimation process. Within this framework, useful information related to the critical choice of parameters needed for the implementation of the methods are presented, in order to provide further guidelines for their application. Furthermore, the methods are compared in terms of results accuracy and computational time for full blank and lightweight gears. This comparison leads to useful guidelines regarding the definition of the most suitable approach depending on the specific requirements. Finally, two variants of an examined hybrid method are presented. They are based on linear, nonlinear FE analyses and analytical formulation. Their purpose is to compare the use of different analytical formulations against the FE formulation for the computation of the local deformation of gear teeth.}, keywords = {Battarra M., Mucchi E., Natali C.}, pubstate = {published}, tppubtype = {article} } Several methodologies for the mesh stiffness calculation in spur gears have been found in the literature, in the last decades. Based on a bibliographical analysis and the research activities of the authors, attention has been devoted to three methodologies, which appeared as the most employed and cited. A critical review of such methodologies, FE-based method, hybrid analytical-FE method, and analytical approach, has been undertaken, highlighting some crucial aspects regarding the mesh stiffness estimation process. Within this framework, useful information related to the critical choice of parameters needed for the implementation of the methods are presented, in order to provide further guidelines for their application. Furthermore, the methods are compared in terms of results accuracy and computational time for full blank and lightweight gears. This comparison leads to useful guidelines regarding the definition of the most suitable approach depending on the specific requirements. Finally, two variants of an examined hybrid method are presented. They are based on linear, nonlinear FE analyses and analytical formulation. Their purpose is to compare the use of different analytical formulations against the FE formulation for the computation of the local deformation of gear teeth. |
Guerra Davide; Polastri Marco; Battarra Mattia; Suman Alessio; Mucchi Emiliano; Pinelli Michele Design Multistage External Gear Pumps for Dry Sump Systems: Methodology and Application (Journal paper) Mathematical Problems in Engineering , 2021 , 2021. (Abstract | Links | BibTeX | Tag: Battarra M., Guerra D., Mucchi E., Pinelli M., Polastri M., Suman A.) @article{Guerra2021, title = {Design Multistage External Gear Pumps for Dry Sump Systems: Methodology and Application}, author = {Guerra Davide; Polastri Marco; Battarra Mattia; Suman Alessio; Mucchi Emiliano; Pinelli Michele }, doi = {10.1155/2021/8888128}, year = {2021}, date = {2021-03-10}, journal = {Mathematical Problems in Engineering }, volume = {2021}, abstract = {Thanks to their manufacturing simplicity, robustness, and consolidated design knowledge, external gear pumps are widely adopted in the automotive fields. With the purpose of leading the design procedure of these positive displacement machines, within this work, the authors integrate in a comprehensive tool the salient equations adopted for the design of the major gear pump features. The presented procedure is devoted to the design of multistage external gear pumps characterized by a singular floating driving shaft supported by fluid-dynamic journal bearings. Focusing the attention on the procedure flexibility, it has been structured in three iterative calculation phases. The core section of the methodology concerns the geometrical design of the involute gear tooth profile. It is oriented to ensure a proper volumetric displacement while complying with the space requirement and the tooth manufacturing limitations. Thus, through the analytical pressure loads estimation combined with the operational parameters, the second calculation step provides the design of the driving shaft and the relevant dimensions of the journal bearings. Finally, by means of a power loss approach, the third macrosection of the procedure leads to estimating the clearances between gear tip and housing. The potentials of the methodology are exposed by describing its applications to a case study of multistage gear pump employed in the dry sump lubrication system of an automotive heavy-duty engine. Each calculation step application is outlined with reference to the proposed analytical formulation and the results of the parameters calibration are presented. Within this context, the procedure is assessed by means of a CFD analysis. The results highlight the accuracy of the methodology on the estimation of the required delivery flow rate. Aside from being accurate, flexible, and reliable, the procedure stands out for being an innovative tool within the multistage gear pump framework.}, keywords = {Battarra M., Guerra D., Mucchi E., Pinelli M., Polastri M., Suman A.}, pubstate = {published}, tppubtype = {article} } Thanks to their manufacturing simplicity, robustness, and consolidated design knowledge, external gear pumps are widely adopted in the automotive fields. With the purpose of leading the design procedure of these positive displacement machines, within this work, the authors integrate in a comprehensive tool the salient equations adopted for the design of the major gear pump features. The presented procedure is devoted to the design of multistage external gear pumps characterized by a singular floating driving shaft supported by fluid-dynamic journal bearings. Focusing the attention on the procedure flexibility, it has been structured in three iterative calculation phases. The core section of the methodology concerns the geometrical design of the involute gear tooth profile. It is oriented to ensure a proper volumetric displacement while complying with the space requirement and the tooth manufacturing limitations. Thus, through the analytical pressure loads estimation combined with the operational parameters, the second calculation step provides the design of the driving shaft and the relevant dimensions of the journal bearings. Finally, by means of a power loss approach, the third macrosection of the procedure leads to estimating the clearances between gear tip and housing. The potentials of the methodology are exposed by describing its applications to a case study of multistage gear pump employed in the dry sump lubrication system of an automotive heavy-duty engine. Each calculation step application is outlined with reference to the proposed analytical formulation and the results of the parameters calibration are presented. Within this context, the procedure is assessed by means of a CFD analysis. The results highlight the accuracy of the methodology on the estimation of the required delivery flow rate. Aside from being accurate, flexible, and reliable, the procedure stands out for being an innovative tool within the multistage gear pump framework. |
2020 |
Battarra Mattia; Mucchi Emiliano Analytical determination of the vane radial loads in balanced vane pumps (Journal paper) Mechanism and Machine Theory, 154 (104037), 2020, ISSN: 0094114X. (Abstract | Links | BibTeX | Tag: Battarra M., Mucchi E.) @article{2020k, title = {Analytical determination of the vane radial loads in balanced vane pumps}, author = {Battarra Mattia; Mucchi Emiliano}, doi = {10.1016/j.mechmachtheory.2020.104037}, issn = {0094114X}, year = {2020}, date = {2020-12-01}, journal = {Mechanism and Machine Theory}, volume = {154}, number = {104037}, abstract = {The present study proposes an analytical methodology to estimate the variable loads applied to the vanes of balanced vane pumps. The dissertation is adopted to detail the nature of the different time-varying excitations that load the machine and to define their analytical calculation on the basis of vane geometry, cam ring profile and working conditions. In this context, a dimensional reduction is proposed in order to highlight how the pump geometrical parameters affect each single force component and how they may be used to modify the ratio between each load contribution. A comprehensive overview of the mutual interconnections between time-varying loads and the pump design is provided by means of a parametric study involving vane design parameters, pump displacement and cam ring shape. Admissibility of the pump geometry is verified throughout the entire study. The results show that, given the cam ring shape, the vane design significantly influences the radial loads, which may also reach negative values and promote the vane detachment.}, keywords = {Battarra M., Mucchi E.}, pubstate = {published}, tppubtype = {article} } The present study proposes an analytical methodology to estimate the variable loads applied to the vanes of balanced vane pumps. The dissertation is adopted to detail the nature of the different time-varying excitations that load the machine and to define their analytical calculation on the basis of vane geometry, cam ring profile and working conditions. In this context, a dimensional reduction is proposed in order to highlight how the pump geometrical parameters affect each single force component and how they may be used to modify the ratio between each load contribution. A comprehensive overview of the mutual interconnections between time-varying loads and the pump design is provided by means of a parametric study involving vane design parameters, pump displacement and cam ring shape. Admissibility of the pump geometry is verified throughout the entire study. The results show that, given the cam ring shape, the vane design significantly influences the radial loads, which may also reach negative values and promote the vane detachment. |
Polastri Marco; Battarra Mattia; Milani Massimo; Storchi Gabriele; Montorsi Luca; Mucchi Emiliano On the 0d - 3d modelling procedure for the filling analysis of the lubrication system of internal combustion engines (Conference) BATH/ASME 2020 Symposium on Fluid Power and Motion Control, FPMC 2020, (V001T01A049), 2020, ISBN: 978-079188375-4. (Abstract | Links | BibTeX | Tag: Battarra M., Milani M., Montorsi L., Mucchi E., Polastri M., Storchi G.) @conference{Polastri2020, title = {On the 0d - 3d modelling procedure for the filling analysis of the lubrication system of internal combustion engines}, author = {Polastri Marco; Battarra Mattia; Milani Massimo; Storchi Gabriele; Montorsi Luca; Mucchi Emiliano}, doi = {10.1115/FPMC2020-2798}, isbn = {978-079188375-4}, year = {2020}, date = {2020-09-09}, booktitle = {BATH/ASME 2020 Symposium on Fluid Power and Motion Control, FPMC 2020}, number = {V001T01A049}, abstract = {The paper focuses on the development of a predictive numerical tool for the assessment of the filling performance of engine lubrication systems. Filling analyzes are typically carried out by means of multi-phase 3-D CFD models but, despite allowing detailed and reliable results, they require very demanding computational requirements. On this basis, a procedure for the lumped parameter modelling of the fluid domain is proposed, allowing the discretization of complex systems that cannot be straightforwardly attributable to elementary submodels. The presented criteria are then applied to the lubrication system of a heavy-duty engine, for which the filling of the circuit plays a fundamental role. Different temperature conditions are simulated, and the predictive capabilities of the numerical model are presented in terms of flow pattern and filling time of the circuit branches. The same simulations are also carried out by means of a 3-D CFD model, permitting a result comparison. The comparative analysis concerns both the overall distribution of the lubricant over time, and the local phenomena within the oil domain, in order to assess the approximation of the lumped parameter approach with respect to the more accurate three-dimensional models. Copyright © 2020 ASME.}, keywords = {Battarra M., Milani M., Montorsi L., Mucchi E., Polastri M., Storchi G.}, pubstate = {published}, tppubtype = {conference} } The paper focuses on the development of a predictive numerical tool for the assessment of the filling performance of engine lubrication systems. Filling analyzes are typically carried out by means of multi-phase 3-D CFD models but, despite allowing detailed and reliable results, they require very demanding computational requirements. On this basis, a procedure for the lumped parameter modelling of the fluid domain is proposed, allowing the discretization of complex systems that cannot be straightforwardly attributable to elementary submodels. The presented criteria are then applied to the lubrication system of a heavy-duty engine, for which the filling of the circuit plays a fundamental role. Different temperature conditions are simulated, and the predictive capabilities of the numerical model are presented in terms of flow pattern and filling time of the circuit branches. The same simulations are also carried out by means of a 3-D CFD model, permitting a result comparison. The comparative analysis concerns both the overall distribution of the lubricant over time, and the local phenomena within the oil domain, in order to assess the approximation of the lumped parameter approach with respect to the more accurate three-dimensional models. Copyright © 2020 ASME. |
Natali Caterina; Battarra Mattia; Giorgio Dalpiaz; Emiliano Mucchi A comparison between gear mesh stiffness calculation methods and their sensitivity for lightweight gears (Journal paper) Proceedings of ISMA 2020 - International Conference on Noise and Vibration Engineering and USD 2020 - International Conference on Uncertainty in Structural Dynamics, pp. 1403 - 1418, 2020, ISBN: 978-908289311-3. (Abstract | BibTeX | Tag: Battarra M., Dalpiaz G., Mucchi E., Natali C.) @article{Natali2020, title = {A comparison between gear mesh stiffness calculation methods and their sensitivity for lightweight gears}, author = {Natali Caterina; Battarra Mattia; Giorgio Dalpiaz; Emiliano Mucchi}, editor = {KU Leuven - Departement Werktuigkunde }, isbn = {978-908289311-3}, year = {2020}, date = {2020-09-09}, journal = {Proceedings of ISMA 2020 - International Conference on Noise and Vibration Engineering and USD 2020 - International Conference on Uncertainty in Structural Dynamics}, pages = {1403 - 1418}, abstract = {The present work deals with the analysis of the criticalities connected to the calculation of the mesh stiffness for spur gears. In particular, the proposed dissertation compares the most famous methods for the mesh stiffness calculation, found in the literature, focusing the attention on their accuracy for the lightweight gear case. Specifically, five methods have been investigated, one based on an analytical approach, two based on finite element (FE) methods and two hybrid analytical-FE methods. Moreover, an hybrid linear FE-non-linear FE method has been proposed. The sensitivity of the illustrated methods on the mesh stiffness in the analysis case of lightweight gears is investigated and presented. Pros and cons about the analysed approaches have been assessed, in terms of accuracy of the results and computational time. Furthermore, the paper presents different focuses on untreated topics found in the references.}, keywords = {Battarra M., Dalpiaz G., Mucchi E., Natali C.}, pubstate = {published}, tppubtype = {article} } The present work deals with the analysis of the criticalities connected to the calculation of the mesh stiffness for spur gears. In particular, the proposed dissertation compares the most famous methods for the mesh stiffness calculation, found in the literature, focusing the attention on their accuracy for the lightweight gear case. Specifically, five methods have been investigated, one based on an analytical approach, two based on finite element (FE) methods and two hybrid analytical-FE methods. Moreover, an hybrid linear FE-non-linear FE method has been proposed. The sensitivity of the illustrated methods on the mesh stiffness in the analysis case of lightweight gears is investigated and presented. Pros and cons about the analysed approaches have been assessed, in terms of accuracy of the results and computational time. Furthermore, the paper presents different focuses on untreated topics found in the references. |
Battarra Mattia; Mucchi Emiliano Estimation of time-varying forces loading the vane in balanced vane pumps (Conference) Proceedings of ISMA 2020 - International Conference on Noise and Vibration Engineering and USD 2020 - International Conference on Uncertainty in Structural Dynamics, 2020, ISBN: 9789082893113. (Abstract | BibTeX | Tag: Battarra M., Mucchi E.) @conference{2020i, title = {Estimation of time-varying forces loading the vane in balanced vane pumps}, author = {Battarra Mattia; Mucchi Emiliano}, isbn = {9789082893113}, year = {2020}, date = {2020-09-09}, booktitle = {Proceedings of ISMA 2020 - International Conference on Noise and Vibration Engineering and USD 2020 - International Conference on Uncertainty in Structural Dynamics}, pages = {1245-1256}, abstract = {The present study proposes an analytical methodology to estimate the variable loads applied to the vanes of balanced vane pumps. The dissertation is adopted to detail the nature of the different time-varying excitations that load the machine and to define their analytical calculation on the basis of vane geometry, cam ring profile and working conditions. A comprehensive overview of the mutual interconnections between time-varying loads and the pump design is provided by means of a parametric study involving vane thickness, tip radius and cam ring shape. Admissibility of the pump geometry is verified throughout the entire study. The results show that the vane tip radius affects both the inertial forces and the under-vane pressure load by its influence on the vane radial motion. Concurrently, the vane thickness acts as a gain factor with respect to the magnitude of the under-vane pressure load. Despite not altering the kinematic vane motion, effects on the inertial forces are recognized due vane mass changing related to thickness variation.}, keywords = {Battarra M., Mucchi E.}, pubstate = {published}, tppubtype = {conference} } The present study proposes an analytical methodology to estimate the variable loads applied to the vanes of balanced vane pumps. The dissertation is adopted to detail the nature of the different time-varying excitations that load the machine and to define their analytical calculation on the basis of vane geometry, cam ring profile and working conditions. A comprehensive overview of the mutual interconnections between time-varying loads and the pump design is provided by means of a parametric study involving vane thickness, tip radius and cam ring shape. Admissibility of the pump geometry is verified throughout the entire study. The results show that the vane tip radius affects both the inertial forces and the under-vane pressure load by its influence on the vane radial motion. Concurrently, the vane thickness acts as a gain factor with respect to the magnitude of the under-vane pressure load. Despite not altering the kinematic vane motion, effects on the inertial forces are recognized due vane mass changing related to thickness variation. |
Guerra Davide; Polastri Marco; Battarra Mattia; Suman Alessio; Mucchi Emiliano; Pinelli Michele A design procedure for multistage external gear pumps (Conference) BATH/ASME 2020 Symposium on Fluid Power and Motion Control, FPMC 2020, (V001T01A048), 2020, ISBN: 978-079188375-4. (Abstract | Links | BibTeX | Tag: Battarra M., Guerra D., Mucchi E., Pinelli M., Polastri M., Suman A.) @conference{2020l, title = {A design procedure for multistage external gear pumps}, author = {Guerra Davide; Polastri Marco; Battarra Mattia; Suman Alessio; Mucchi Emiliano; Pinelli Michele}, doi = {10.1115/FPMC2020-2797}, isbn = {978-079188375-4}, year = {2020}, date = {2020-09-09}, booktitle = {BATH/ASME 2020 Symposium on Fluid Power and Motion Control, FPMC 2020}, number = {V001T01A048}, abstract = {n this work, the authors present a robust and integrated procedure for the design of multi-stage gear pumps to be used in dry sump system applications. Based on the target delivery flow rate, rotational speed and fluid properties, the developed iterative method enables to directly obtain the geometrical features and the working parameters of the pump components, such as gearpair specifics, shaft and journal bearing dimensions, clearance values. The methodology is then applied to a case study in order to highlight its features and detail the achievable outcomes. Quality of the results is assessed by means of a CFD analysis, demonstrating the capability to obtain the expected volumetric efficiency}, keywords = {Battarra M., Guerra D., Mucchi E., Pinelli M., Polastri M., Suman A.}, pubstate = {published}, tppubtype = {conference} } n this work, the authors present a robust and integrated procedure for the design of multi-stage gear pumps to be used in dry sump system applications. Based on the target delivery flow rate, rotational speed and fluid properties, the developed iterative method enables to directly obtain the geometrical features and the working parameters of the pump components, such as gearpair specifics, shaft and journal bearing dimensions, clearance values. The methodology is then applied to a case study in order to highlight its features and detail the achievable outcomes. Quality of the results is assessed by means of a CFD analysis, demonstrating the capability to obtain the expected volumetric efficiency |
Alberto Gabrielli, Francesco Pizzolante, Elia Soave, Mattia Battarra, Cristiano Mazzeo, Marco Tarabra, Enrico Fava, Emiliano Mucchi A numerical model for NVH analysis of gearboxes employed on agricultural equipment (Conference) 2020 International Conference on Noise and Vibration Engineering, ISMA 2020 and 2020 International Conference on Uncertainty in Structural Dynamics, USD 2020, 2020, ISBN: 978-908289311-3. (Abstract | BibTeX | Tag: Battarra M., Fava E., Gabrielli A., Mazzeo C., Mucchi E., Pizzolante F., Soave E., Tarabra M.) @conference{Gabrielli2020, title = {A numerical model for NVH analysis of gearboxes employed on agricultural equipment}, author = {Alberto Gabrielli, Francesco Pizzolante, Elia Soave, Mattia Battarra, Cristiano Mazzeo, Marco Tarabra, Enrico Fava, Emiliano Mucchi}, editor = {Proceedings of ISMA 2020 - International Conference on Noise and Vibration Engineering and USD 2020 - International Conference on Uncertainty in Structural Dynamics}, isbn = {978-908289311-3}, year = {2020}, date = {2020-09-07}, booktitle = {2020 International Conference on Noise and Vibration Engineering, ISMA 2020 and 2020 International Conference on Uncertainty in Structural Dynamics, USD 2020}, pages = {3191-3203}, abstract = {The aim of this paper is to describe a numerical vibro-acoustic methodology, experimentally assessed, for the estimation of the overall vibratory and acoustic level of a gearbox employed on agricultural equipment. The process is carried out in order to create the NVH digital twin of the real gearbox. The vibro-acoustic model is the combination of three sub-models: a lumped-parameter (LP) model, a structural finite-element (SFE) model and an acoustical finite-element (AFE) model. The LP model is used to obtain the reaction forces on the bearings during working conditions. Reaction forces are employed as an input for the further SFE dynamic model to evaluate the dynamic response of the gearbox's case, which is the only meshed part. The dynamic response is exploited to set-up an AFE model which allows to estimate the noise generation in terms of overall acoustic pressure. The numerical simulation results are validated using experimental data acquired on a real gearbox. Testing activities have been carried out at Comer Industries facility in Reggiolo, where specimens and test benches have been set. Advantages and limitations of the model are reported.}, keywords = {Battarra M., Fava E., Gabrielli A., Mazzeo C., Mucchi E., Pizzolante F., Soave E., Tarabra M.}, pubstate = {published}, tppubtype = {conference} } The aim of this paper is to describe a numerical vibro-acoustic methodology, experimentally assessed, for the estimation of the overall vibratory and acoustic level of a gearbox employed on agricultural equipment. The process is carried out in order to create the NVH digital twin of the real gearbox. The vibro-acoustic model is the combination of three sub-models: a lumped-parameter (LP) model, a structural finite-element (SFE) model and an acoustical finite-element (AFE) model. The LP model is used to obtain the reaction forces on the bearings during working conditions. Reaction forces are employed as an input for the further SFE dynamic model to evaluate the dynamic response of the gearbox's case, which is the only meshed part. The dynamic response is exploited to set-up an AFE model which allows to estimate the noise generation in terms of overall acoustic pressure. The numerical simulation results are validated using experimental data acquired on a real gearbox. Testing activities have been carried out at Comer Industries facility in Reggiolo, where specimens and test benches have been set. Advantages and limitations of the model are reported. |
Battarra Mattia; Mucchi Emiliano On the relation between vane geometry and theoretical flow ripple in baalnced vane pumps (Journal paper) Mechanism and Machine Theory, 2020. (Links | BibTeX | Tag: Battarra M., Mucchi E.) @article{Emiliano2020, title = {On the relation between vane geometry and theoretical flow ripple in baalnced vane pumps}, author = {Battarra Mattia; Mucchi Emiliano}, doi = {10.1016/j.mechmachtheory.2019.103736}, year = {2020}, date = {2020-04-01}, journal = {Mechanism and Machine Theory}, keywords = {Battarra M., Mucchi E.}, pubstate = {published}, tppubtype = {article} } |
Battarra, Mattia; Mucchi, Emiliano On the assessment of lumped parameter models for gear pump performance prediction (Journal paper) Simulation Modelling Practice and Theory, 2020. (Links | BibTeX | Tag: Battarra M., Mucchi E.) @article{Battarra2020, title = {On the assessment of lumped parameter models for gear pump performance prediction}, author = {Battarra, Mattia; Mucchi, Emiliano}, url = {https://www.sciencedirect.com/science/article/pii/S1569190X19301418?via%3Dihub}, doi = {10.1016/j.simpat.2019.102008}, year = {2020}, date = {2020-02-01}, journal = {Simulation Modelling Practice and Theory}, keywords = {Battarra M., Mucchi E.}, pubstate = {published}, tppubtype = {article} } |
2019 |
Battarra Mattia; Mucchi Emiliano Influence of different design parameters on the theoretical flow ripple in balanced vane pumps (Journal paper) Proceedings of the ASME Design Engineering Technical Conference, 8 , 2019. (Links | BibTeX | Tag: Battarra M., Mucchi E.) @article{Emiliano2019, title = {Influence of different design parameters on the theoretical flow ripple in balanced vane pumps}, author = {Battarra Mattia; Mucchi Emiliano}, doi = {10.1115/DETC2019-97052}, year = {2019}, date = {2019-08-18}, journal = {Proceedings of the ASME Design Engineering Technical Conference}, volume = {8}, keywords = {Battarra M., Mucchi E.}, pubstate = {published}, tppubtype = {article} } |
Battarra Mattia; Blum Alessandro; Mucchi Emiliano Kinematics of a balanced vane pump with circular tip vanes (Journal paper) Mechanism and Machine Theory, 2019. (Links | BibTeX | Tag: Battarra M., Blum A., Mucchi E.) @article{Battarra2019, title = {Kinematics of a balanced vane pump with circular tip vanes}, author = {Battarra Mattia; Blum Alessandro; Mucchi Emiliano}, url = {https://www.sciencedirect.com/science/article/pii/S0094114X19300849?via%3Dihub}, doi = {10.1016/j.mechmachtheory.2019.03.034}, year = {2019}, date = {2019-07-01}, journal = {Mechanism and Machine Theory}, keywords = {Battarra M., Blum A., Mucchi E.}, pubstate = {published}, tppubtype = {article} } |
2017 |
Buzzoni Marco; Battarra Mattia; Mucchi Emiliano; Dalpiaz Giorgio Motion analysis of a linear vibratory feeder: Dynamic modeling and experimental verification (Journal paper) Mechanism and Machine Theory, 2017. (Links | BibTeX | Tag: Battarra M., Buzzoni M., Dalpiaz G., Mucchi E.) @article{Giorgio2017, title = {Motion analysis of a linear vibratory feeder: Dynamic modeling and experimental verification}, author = {Buzzoni Marco; Battarra Mattia; Mucchi Emiliano; Dalpiaz Giorgio }, url = {https://www.sciencedirect.com/science/article/pii/S0094114X17300952 }, doi = {10.1016/j.mechmachtheory.2017.04.006}, year = {2017}, date = {2017-09-15}, journal = {Mechanism and Machine Theory}, keywords = {Battarra M., Buzzoni M., Dalpiaz G., Mucchi E.}, pubstate = {published}, tppubtype = {article} } |
Battarra Mattia; Mucchi Emiliano Evaluating time dependent pressure forces and torques in external gear machines by means of an analytical approach (Conference) Internoise, Proceedings of the INTER-NOISE 2017- 46th International Congress and Exposition on Noise Control Engineering , 2017. (BibTeX | Tag: Battarra M., Mucchi E.) @conference{Battarra2017, title = {Evaluating time dependent pressure forces and torques in external gear machines by means of an analytical approach}, author = {Battarra Mattia; Mucchi Emiliano }, year = {2017}, date = {2017-09-13}, booktitle = {Internoise, Proceedings of the INTER-NOISE 2017- 46th International Congress and Exposition on Noise Control Engineering }, keywords = {Battarra M., Mucchi E.}, pubstate = {published}, tppubtype = {conference} } |
Buzzoni Marco; Battarra Mattia; Mucchi Emiliano; Dalpiaz Giorgio Noise and vibration improvements in vibratory feeders by analytical models and experimental analysis (Conference) Internoise, Proceedings of the INTER-NOISE 2017- 46th International Congress and Exposition on Noise Control Engineering , 2017. (BibTeX | Tag: Battarra M., Buzzoni M., Dalpiaz G., Mucchi E.) @conference{Buzzoni2017c, title = {Noise and vibration improvements in vibratory feeders by analytical models and experimental analysis}, author = {Buzzoni Marco; Battarra Mattia; Mucchi Emiliano; Dalpiaz Giorgio }, year = {2017}, date = {2017-09-06}, booktitle = {Internoise, Proceedings of the INTER-NOISE 2017- 46th International Congress and Exposition on Noise Control Engineering }, keywords = {Battarra M., Buzzoni M., Dalpiaz G., Mucchi E.}, pubstate = {published}, tppubtype = {conference} } |
2015 |
Battarra Mattia; Mucchi Emiliano; Dalpiaz Giorgio A Model for the Estimation of Pressure Ripple in Tandem Gear Pumps (Conference) Proceedings of the ASME 2015 International Design Engineering Technical Conferences & Computers and Information in Engineering , 2015. (BibTeX | Tag: Battarra M., Dalpiaz G., Mucchi E.) @conference{Battarra2015, title = {A Model for the Estimation of Pressure Ripple in Tandem Gear Pumps}, author = {Battarra Mattia; Mucchi Emiliano; Dalpiaz Giorgio }, year = {2015}, date = {2015-09-16}, booktitle = {Proceedings of the ASME 2015 International Design Engineering Technical Conferences & Computers and Information in Engineering }, keywords = {Battarra M., Dalpiaz G., Mucchi E.}, pubstate = {published}, tppubtype = {conference} } |
