Simulation of Driveline Rattle using Elastic Multi Body Dynamics Approach 2017-26-0191
As automotive technology has evolved, gear rattle has become a prominent contributor for cabin noise as the masking from the engine noise has decreased. The market and customer expectation make the rattle noise a question to be addressed as early as possible in the vehicle development process. However, to simulate rattle, it calls for a detailed modeling of different complex subsystems of driveline to represent their true characteristics.
Thus, the paper adopts an FE based elastic multi body dynamics model to predict gear rattle. The approach involves modeling of a complete flexible driveline using condensed FE models from Nastran in AVL Excite Powerunit/Transmission module. It includes combustion pressure as input excitations to crankshaft and then predicts parameters like gear teeth impacts, gear normal meshing force, dynamic mesh stiffness & overall contact state in transient and frequency domain. The output parameters are then analyzed to evaluate the rattle index. Finally, sensitivity of various design parameters like flywheel inertia, inertia of gear disks, damping in gear backlash region is established. The process will help in early understanding of gear rattle and will potentially reduce expensive design changes and iterations at a later stage.
Citation: Birari, M., Yadav, A., Bijwe, V., and Billade, D., "Simulation of Driveline Rattle using Elastic Multi Body Dynamics Approach," SAE Technical Paper 2017-26-0191, 2017, https://doi.org/10.4271/2017-26-0191. Download Citation
Author(s):
Mayur Birari, Arvind Yadav, Vilas Bijwe, Dayanand Billade
Affiliated:
Tata Motors, Ltd., Tata Technologies
Pages: 7
Event:
Symposium on International Automotive Technology 2017
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Noise
Gears
Crankshafts
Flywheels
Combustion and combustion processes
Simulation and modeling
Transmissions
Pressure
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