Publications
2021 |
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 |
2020 |
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. |