中文摘要：

对车门防撞梁的原始设计方案进行优化,以M形截面车门防撞梁替代原管型防撞梁的设计方案,并以M形截面车门防撞梁的材料参数作为设计变量,以提高车门防撞梁的轻量化性能及其在侧面碰撞中的吸能性为优化目标,采用正交试验设计方法进行样本数据设计,使用响应面法建立车门防撞梁轻量化性能及吸能性的多学科近似模型,通过遗传法最终得到最优的车门防撞梁材料方案,在保证其质量不增加的情况下,显著提高了车门防撞梁的碰撞吸能性.

英文摘要：

In order to optimize the original design of the door impact beam, the type of door impact beam was improved from tube to M-shaped cross-section. The material parameters of the M-shaped cross-section door impact beam were as the design variables. In order to improve the lightweight performance of door impact beam and colli- sion energy absorbing property, the muhidisciplinary approximate model of lightweight performance and collision en- ergy absorbing property was established using the response surface method with orthogonal experimental design method for the design of the sample data. Uuhimately by the genetic algorithm to get the optimal material program of door impact beam to significantly improve the collision energy absorbing property of door impact beam, in the case of quality does not increase.