Abstract: In order to obtain a lightweight passenger car brake disc structure that meets modal separation requirements, and also provide a theoretical basis for the modal optimization design and development of passenger car brake discs. Taking a passenger car brake disc as the research object, a modal finite element simulation analysis model of a passenger car brake disc is created. Taking the structural parameters of a passenger car brake disc as the design variables for modal optimization of the brake disc, an experimental design is conducted using the method of extensible lattice sequence. The kriging method is used to create a modal response surface analysis model for a passenger car brake disc, and then the genetic algorithm method is used to optimize the modal response surface analysis model for a passenger car brake disc. The results show that the brake disc obtained based on the response surface optimization method for a passenger car meets the modal separation requirements. The brake disc after optimization is 8.114 8 kg, the original mass before optimization is 9.739 kg. After optimization, it has been reduced by about 16.68%, with a significant lightweight effect.

Key words: Brake disc; Modal analysis; Response surface method; Light weight

摘要： 为了得到满足模态分离且质量轻的乘用车制动盘结构，同时也为乘用车制动盘的模态 优化设计开发提供理论依据，以某乘用车制动盘为研究对象，创建某乘用车制动盘的模态有 限元仿真分析模型，将某乘用车制动盘的结构参数作为制动盘模态优化的设计变量，通过可 扩展的格栅序列法进行试验设计，使用克里格法进行某乘用车制动盘模态响应面分析模型的 创建，再采用遗传算法对某乘用车制动盘模态响应面分析模型进行优化。结果表明，基于响 应面优化法获得的某乘用车制动盘满足模态分离要求，优化后的质量为 8.114 8 kg，优化前的 质量为 9.739 kg，优化后的质量减轻了约 16.68%，轻量化效果显著。

关键词: 制动盘；模态分析；响应面法；轻量化