中文摘要：

结合静态和动态拓扑优化方法对汽车前纵梁进行耐撞性设计,通过静态拓扑优化方法分别获得前纵梁在轴向刚度最大和侧向刚度最大时的结构形式,通过动态拓扑优化方法获得前纵梁具有最大吸能时的结构形式。对拓扑优化结果进行分析,综合考虑前纵梁的轴向刚度、侧向刚度和吸能特性,最终确定前纵梁的最佳截面形式与诱导结构的尺寸和位置。优化前后前纵梁的吸能特性对比结果表明,拓扑优化使前纵梁的耐撞性能有一定的提高。

英文摘要：

Based on static and dynamic topology optimization.the crashworthiness of automotive front rail was designed.A maximum axial stiffness and a maximum side stiffness of front rail structure form were obtainted through static topology optimization.A maximum energy absorption of front rail structure form was obtained through dynamic topology optimization.Through analyzing the topology optimization results and comprehensively considering the axial stiffness,the lateral stiffness and energy absorption characteristics,the optimal cross section form and the induced-structure,s size and location of front rail was obtained.The results obtained by constrastive analyses show that the frontal rail crashworthiness is improved.