中文摘要：

传统拼焊板零件的焊缝线位置的确定是依靠工程经验来进行试错设计的,导致拼焊板的性能得不到充分的发挥。为了提高拼焊板零件的设计水平,集成双向渐进结构优化方法、灵敏性分析方法和尺寸优化方法,提出一套拼焊板零件设计的新方法。应用新方法进行了车门拼焊板系统的设计研究,研究结果表明,在保证拼焊板车门各种刚度性能要求指标下,车门系统减重12.5%。新方法能有效提高拼焊板零件的设计水平,一定程度上促进我国汽车工业的发展。

英文摘要：

In traditional design process,people always determine the location of weld lines of TWB parts by their personal experience or by a lot of trial and error design,leading the performance of TWB can not be brought into full play.So,in order to improve the design of TWB parts,a new method for the design of TWB parts was generated and applied to improve the stiffness of the car,lighten the total weight by 12.5%,which was based on bi-directional evolutionary structural optimization,sensitivity analysis method and size optimization.The proposed method can obtain a good optimization results to improve the projects to a certain extent,it promotes the development of China＇s automobile industry.