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中文摘要：
以汽车前部结构主要板件的厚度为变量,采用拉丁超立方试验设计生成100个汽车正面碰撞有限元仿真模型的样本数据并进行计算,对计算结果应用Kriging模拟法构建了前部结构的质量、B柱加速度最大值和最大吸能的近似模型。以B柱加速度最大值为目标,以前部结构的质量、各板件厚度和最大吸能为约束,利用模拟退火算法进行全局优化,最终得到一组前部板件厚度的最优组合,使B柱加速度最大值达到最小。Kriging模型的计算精度和效率满足耐撞性工程设计的要求。
英文摘要：
Taking the panel thicknesses of vehicle front end as variables,100 sampling data of finite element model for vehicle frontal crash are generated and calculated by using Latin hypercube design of experiment,and Kriging modeling technique is applied to the construction of the surrogate models for the mass,the maximum acceleration of B pillar and the maximum energy absorbed of front end structure based on the calculated results.A global optimization is then conducted using simulated annealing algorithm with the maximum acceleration of B pillar as objective,the mass,panel thicknesses and maximum energy absorbed of front end as constraints.Finally a set of optimum combination of panel thicknesses is obtained,which makes the maximum acceleration of B pillar minimized.The accuracy and efficiency of calculation in Kriging modeling meet the requirements of the engineering design for crashworthiness.
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