关键词: 振动与波, 副车架, 橡胶衬套, 动刚度, 当量方法, 正交试验

Abstract:

Aiming at the problem of rubber bushings boundary in calculating modal analysis of subframe,CBUSH unit was used to simulate the rubber bush in finite element analysis software with equivalent value of rubber bushings’s dynamic stiffness. Based on the ratio of dynamic stiffness to static stiffness, a dynamic stiffness equivalent method based on static stiffness of rubber bushings is proposed which called rubber bushings dynamic stiffness correction coefficient equivalent method. By comparing the experimental modal and the calculated modal, the validity of the dynamic stiffness equivalent method of rubber bushings is proved by using the orthogonal experimental design, and the influence of rubber bushings on the accuracy of the model is clarified,which can be applied to the related modeling analysis.