• Saravanan K
• BHAGATE RAJKUMAR
• G MATHAN

Rattle noise from manual transaxle is always a concern which affects comfort and ride quality. The rattle is influenced by the nonlinear dynamic deformation of multiple pairs of idler gears in a multistage transaxle system. Prediction of overall contribution of gear rattle noise in multistage gear box is very difficult. The drag torque on driven gear, gear backlash, gear inertia, oil level viscosity and the level of torque fluctuation through gear system are influencing on the level of gear rattle. In this work, six speed manual transaxle used to examine for 5th and 6th gear rattle noise. To build mathematical simulation model based on dynamic system combined with AVL Excite power unit® software is used. The vibro – impact by backlash between the meshing gears which leads excessive vibration and noise in many geared rotating systems which is evaluated by using data recovery method to predict overall housing structural NVH which is further used to analyze gear rattle. In this paper gear rattle is analyzed for different backlash such as maximum, nominal, and minimum value used with different second order excitation in gear input shaft. Also, the structural velocity and impulse force from simulation is used to investigate unloaded gear rattle in manual transaxle. Based on the sensitivity analysis, design guidelines are proposed to optimize the gear rattle in the transaxle.

Gear rattle, Finite element model, Excite Power Unit, Surface velocity and Gear housing

"Sensitivity analyses of gear rattle noise using multi body simulation with advanced gear contact model", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 9, page no.b352-b358, September-2022, Available :http://www.jetir.org/papers/JETIR2209144.pdf

"Sensitivity analyses of gear rattle noise using multi body simulation with advanced gear contact model", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 9, page no. ppb352-b358, September-2022, Available at : http://www.jetir.org/papers/JETIR2209144.pdf