Simulation of Driveline Rattle using Elastic Multi Body Dynamics Approach Tata Motors, Limited

Format:

Conference/Event

Author/Creator:

Birari, Birari, author.

Contributor:

Bijwe, Vilas

Billade, Dayanand

Yādava, Aravinda

Conference Name:

Symposium on International Automotive Technology 2017 (2017-01-18 : Pune, India)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2017

Summary:

AbstractAs 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 and 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

Notes:

Vendor supplied data

Publisher Number:

2017-26-0191

Access Restriction:

Restricted for use by site license