橡胶衬套动刚度理论模型分析及验证

Analysis and Verification of Rubber Bushing Dynamic Stiffness Theoretical Model

为了研究橡胶衬套的动态刚度特性,使用了Berg橡胶衬套模型,并结合橡胶衬套的摩擦效应,建立了具有摩擦特性的Adams/Car多体动力学模型。通过实验确定了包含摩擦特性的橡胶衬套模型的关键参数,并将其用于多体动力学模型。同时在Adams/Template中建立六分力模型,描述橡胶衬套在不同方向上的力学特性,验证动刚度橡胶衬套模型动态力学特性的多体动力学整车模型的精确性。结果表明:动刚度橡胶衬套模型结果更贴近实验,多体动力学模型比Kelvin-Voigt模型更精确;同样,当考虑对橡胶衬套进行预加载时,动态刚度橡胶衬套模型的多体动力学模型与实验的一致性更好。

In order to investigate the dynamic stiffness characteristics of the rubber bushing,the Berg rubber bushing model was used,and the Adams/Car multibody dynamics model with friction characteristics was established by incorporating the friction effect of the rubber bushing.The key parameters of the rubber bushing model containing friction characteristics were determined experimentally and used in the multibody dynamics model.At the same time,a six-component force model is established in Adams/Template to describe the mechanical characteristics of rubber bushing in different directions,and verify the accuracy of the multi-body dynamic vehicle model with dynamic stiffness rubber bushing model.The results show that the dynamic stiffness rubber bushing model is closer to the experimental results,and the multi-body dynamic model is more accurate than the Kelvin-Voigt model;similarly,the multibody dynamic model of the dynamic stiffness rubber bushing model is in better agreement with the experiments when the preloading of the rubber bushing is considered.