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Drivetrain Gear Rattle Simulation Methodology & Optimization: Simulation and Testing Correlation
Technical Paper
2023-01-1136
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper describes a simulation methodology developed for gear rattle severity evaluation and drivetrain architecture optimization. The noise generated by gear rattle is one of the main contributors towards customer’s overall NVH perception. This study adopts a model-based design approach to simulate the tendency of gear rattle in neutral and drive conditions. Gear rattle simulation model for Tractor driveline developed in 1-D environment and correlated with test data acquired on tractor drivelines for multiple field applications. This analytical physics-based model includes engine torsional signature, clutch damper torsional characteristic and dynamics of traction and PTO driveline. This dynamic simulation model helps to understand and predict the gear rattle severity of various drivetrain architecture early in the product development cycle and assess & Optimize driveline NVH performance. The simulation model predicts the mesh force variation between the gear pairs based on engine excitation & driveline system dynamic response. The standard deviation of this gear mesh force is used as a gear rattle metric to quantify the rattle tendency and correlated with NVH subjective assessment. DOE conducted to assess the impact of the various driveline parameters i.e., Flywheel inertia, damper stiffness & hysteresis, gear backlash etc. on gear rattle metric. This virtual methodology was deployed for multiple drivetrain architecture evaluation & based on the analysis optimal drivetrain architecture adopted for better customer NVH perception. This methodology helped in developing new predictive simulation workflows to resolve design issues analytically and effectively within a relatively shorter time with significant reduction of product development time and cost.
Authors
Citation
Kumar, S., Veerkar, V., and Memane, N., "Drivetrain Gear Rattle Simulation Methodology & Optimization: Simulation and Testing Correlation," SAE Technical Paper 2023-01-1136, 2023, https://doi.org/10.4271/2023-01-1136.Also In
References
- Liang , M. , Wang , Y. , and Zhao , T. Optimization on Nonlinear Dynamics of Gear Rattle in Automotive Transmission System Shock and Vibration 2019 2019 12 https://doi.org/10.1155/2019/4056204
- Drexl , H.J. Torsional Dampers and Alternative Systems to Reduce Driveline Vibrations SAE Technical Paper 870393 1987 https://doi.org/10.4271/870393
- Wu , H. and Wu , G. Driveline Torsional Analysis and Clutch Damper Optimization for Reducing Gear Rattle Shock and Vibration 2016 2016 24 https://doi.org/10.1155/2016/8434625
- Miyasato , H. , Siminatto , G. , and Junior , M. Study of the Gear Rattle Phenomena in Automotive Powertrain Systems 21st International Congress of Mechanical Engineering Natal-Brazil 2011
- Singh , R. , Xie , H. , and Comparin , R.J. Analysis of Automotive Neutral Gear Rattle Journal of Sound and Vibration 131 2 1989 177 196 https://doi.org/10.1016/0022-460X(89)90485-9
- Padmanabhan , C. , Rook , T. , and Singh , R. Modeling of Automotive Gear Rattle Phenomenon: State of the Art SAE Technical Paper 951316 1995 https://doi.org/10.4271/951316
- Wang , M.Y. , Manoj , R. , and Zhao , W. Gear Rattle Modelling and Analysis for Automotive Manual Transmissions Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 215 2 2001 241 258 10.1243/0954407011525610
- Crowther , R. , Janello , C. , and Singh , R. Quantification of Clearance-Induced Impulsive Sources in a Torsional System Journal of Sound and Vibration 307 3–5 2007 428 451 https://doi.org/10.1016/j.jsv.2007.05.055
- Bile , Y. , Gondhalekar , A. , and Kumbhar , M. Studies on Neutral Gear Rattle in Early-Stage Design SAE Technical Paper 2013-26-0109 2013 https://doi.org/10.4271/2013-26-0109
- J Bora , A. , White , R. , and Chaudhari , D. Gear Rattle Noise Prediction from Dynamic Simulation SAE Int. J. Commer. Veh. 4 1 2011 163 170 https://doi.org/10.4271/2011-01-2242