发动机悬置安装点动刚度分析

Dynamic Stiffness Analysis of Engine Suspension Mounting Points

摘要: 在科技飞速发展的今天，消费者们对汽车性能的期望越来越高，而发动机悬置系统的动态性能对车辆的平顺性和乘坐舒适性起着至关重要的作用。本研究通过对发动机悬置安装点的动刚度进行深入分析，以揭示其对整车NVH性能的影响。首先，本文对汽车NVH性能、发动机悬置系统以及动刚度分析三者之间关系进行串联，建立了汽车前副车架的有限元模型。在此基础上，对模型进行计算前处理，完成材料以及边界条件的设置，进行计算，得到各阶模态的模态贡献量以及反应动刚度的加速度曲线。

Abstract: In today’s rapid technological development, consumers have higher and higher expectations of automobile performance, and the dynamic performance of the engine suspension system plays a crucial role in the smoothness and ride comfort of the vehicle. In this study, the dynamic stiffness of the engine suspension mounting points is deeply analyzed to reveal its influence on the NVH performance of the whole vehicle. Firstly, this paper establishes a finite element model of the front subframe of the vehicle by linking the relationship between the vehicle NVH performance, the engine mounting system and the dynamic stiffness analysis in series. On this basis, the model is pre-processed, the material and boundary conditions are set, and the calculation is performed to obtain the modal contribution of each order mode and the acceleration curve in response to the dynamic stiffness.