Optimization design for improving the vibration modes decoupling rate and vibration isolation performance of a powertrain mounting system based on the genetic algorithm
LU Chihua1,2,3, LIU Yongchen1,2, LIU Zhien1,2, ZHOU Yifan4, ZHANG Lei4
1.Hubei Key Laboratory Of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China;
2.Hubei Collaboration Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan 430070, China;
3. Elite Power Technology co, LTD, Wuhan 430070, China;
4.Tongji University, Shanghai, 200092, China.
Aiming at improving the insufficient vibration modes decoupling rate and disappointing vibration performance of the suspended powertrain mounting system in a SUV, a four points suspension 6DOF multibody dynamic model for optimizing the power assembly was established based on the simplification of the rear suspension to two 3directional elastic springs. The three direction stiffnesses of the suspension were taken as optimal variables, and the natural frequencies and modal decoupling rate were taken as optimization objectives in the optimization model. The optimized linear suspension stiffnesses combined with the parameters of original nonlinear stiffness were applied to judge the limiting action of the suspension. The results show that the distribution of different order modal frequencies of the suspension is reasonable, the decoupling rate between Z and Rx directions is highly improved, and the limiting action of the suspension is satisfactory.
卢炽华1,2,3，刘永臣1,2，刘志恩1,2，周依帆4，张磊4. 基于遗传算法的动力总成悬置模态解耦及隔振性能优化[J]. 振动与冲击, 2018, 37(14): 248-253.
LU Chihua1,2,3, LIU Yongchen1,2, LIU Zhien1,2, ZHOU Yifan4, ZHANG Lei4. Optimization design for improving the vibration modes decoupling rate and vibration isolation performance of a powertrain mounting system based on the genetic algorithm. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(14): 248-253.
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