基于车辆平顺性分析的橡胶衬套动态特性建模

摘要

橡胶衬套的动态特性与载荷的激振频率、幅值等因素相关，其模型的准确性影响车辆平顺性的仿真精度。建立了包含材料弹性、粘弹性与弹塑性的橡胶衬套动态模型，分别采用多项式、分数导数与Bouc-wen模型描述橡胶衬套的弹性、频率相关性及振幅相关性。通过参数辨识确定衬套模型参数并进行仿真，验证了所建模型的准确性。%The dynamic properties of rubber bushing are correlated to exciting frequency and amplitude of loads, its modeling accuracy directly affects the vehicle ride simulation precision. In this research, the dynamic model including material elasticity, viscoelastic and elastic-plastic of rubber bushing is established. We use polynomial, fractional derivative and Bouc-wen model to describe the dependency of elasticity, frequency and amplitude of rubber bushing. With parameter identification and simulation of rubber bushing, the accuracy of the model is verified.