摘要
针对汽车车门外板这一冲压成形零件,从其使用性和制造性两方面综合考虑强度刚度、冲压成形、碰撞安全以及质量最轻进行跨学科的多目标结构优化设计。以结构厚度尺寸为设计变量,以最小下沉刚度、最大减薄率、最大侧碰入侵量以及质量作为目标函数,结合均匀设计法以及最小二乘法构建以上目标函数的近似数学模型。选用自适应过程的优化方法,获得了较为连续的Pareto解前沿,最优厚度尺寸值在保证刚度、侧碰安全性以及良好冲压成形性的同时,实现了5%的结构轻量化,这为工程应用中结构CAD机械设计和结构CAM工艺设计两方面提供了数据支持,并且缩短了产品的开发周期。
Considering stiffness, stamping, collision safety and lightweight, the multi-objective structural optimization of the outer-door panel was completed, which involved in the analysis of usability and manufacturability. Taking the structure thickness as a design variable, and taking the minimum sinking stiffness, the maximum thinning rate, the maximum amount of side impact intrusion and quality as the objective functions, the above approximate mathematics models were built based on the uniform design method （ one of the DOE method） and the leastsquare method. Based on the self-adaptive progress optimal method, the continuous front of the Pareto solution was obtained and 5% was realized lightweight with the optimal thickness, which was ensuring the stiffness, side impact safety and good forming at the same time. The results provide the data support for CAD mechanical structure design and CAM technology, and the product development cycle is shorten.
出处
《汽车零部件》
2017年第8期3-8,共6页
Automobile Parts
关键词
结构设计
工艺分析
近似建模
多目标优化
Structural design
CAM analysis
Approximate modeling
Multi-objective optimization
