新能源汽车集成式变速箱刚强度分析方法的研究
Research on Stiffness and Strength Analysis Method of Integrated Gearbox of New Energy Vehicle

本文利用有限元分析软件对新能源汽车集成式变速箱进行刚强度分析，并针对分析过程中加载方式不够准确、有限元分析方法固有特性会造成计算误差、箱体连接方式存在不足等问题进行了优化。在加载过程中，采用添加轴承外圈的方式更准确的模拟实际加载条件，有效降低了由加载而产生的计算误差；在添加接触对的过程中，设置了接触容差并阐述了接触容差对接触对的影响；在箱体连接的过程中，添加了螺栓模型代替以往直接刚性耦合螺栓孔的连接方式，得到了更精确的刚强度分析结果。通过改善有限元分析方法，最终得到了更精确可信的变速箱刚强度分析结果。
In this paper, finite element analysis software is used to analyze the stiffness and strength of the integrated gearbox of new energy vehicles, and optimization is carried out to solve the problems such as the inaccurate loading mode, the calculation error caused by the inherent characteristics of the finite element analysis method, and the insufficient connection mode of the box. In the loading process, the method of adding bearing outer ring is used to simulate the actual loading conditions more accurately, which effectively reduces the calculation error caused by loading. In the process of adding contact pairs, the contact tolerance is set and the influence of contact tolerance on contact pairs is described. In the process of box connection, a bolt model is added to replace the previous direct rigid coupling bolt hole connection, and more accurate stiffness and strength analysis results are obtained. By improving the finite element analysis method, more accurate and reliable analysis results of gearbox stiffness and strength are finally obtained.