中文摘要：

提出基于灵敏度分析的车身模块重构设计,结合结构优化方法开展客车车身的轻量化设计.通过车身模块化减少灵敏度分析时的设计维度,并基于各子块厚度对车身扭转刚度的灵敏度系数进行车身的模块重构和结构优化.通过对比优化前后整车的强度,验证该方法对客车车身轻量化设计的可行性.结果表明：该方法使客车车身的质量降低了460kg,最大应力减少了14.26%,且降低了车身结构优化设计的复杂度.

英文摘要：

A novel module reconfiguration design and structure optimization method of bus body are proposed based on sensitivity analysis in order to perform lightweight design of bus body.The design dimensions of the sensitivity analysis are reduced by using the body module,moreover,the module reconfiguration and the structure optimization of bus body are performed based on the sensitivity coefficient of each sub-block thickness for body torsional stiffness.Finally,the feasibility of this method to the lightweight design of bus body is verified by comparing the strength of the vehicle before and after optimization.The research results show that the method not only makes the weight and maximum stress of bus body decrease 460 kg and 4.26%,respectively,but also reduce the complexity of body structure optimization design.