CAJ | 학술논문

以汽车前部结构主要零件的厚度为变量,采用拉丁超立方试验设计方法生成100个汽车正面碰撞有限元仿真模型样本数据并进行计算,对计算结果应用Kriging模型、最小二乘响应面模型、径向基函数模型构建前部结构质量、B柱加速度最大值和前部结构最大吸能相对于各部件厚度的三种近似模型。以B柱加速度最大值为目标,约束前部结构最大吸能、前部结构零件质量及各零件厚度,利用模拟退火算法和三种空间密集撒点优化搜索方法,最终得到一组最优的前部零件厚度组合,使得B柱加速度最大值最小。研究表明,该方法计算精度和效率较好地满足了耐撞性工程设计的需求。
이기차전부결구주요령건적후도위변량,채용랍정초립방시험설계방법생성100개기차정면팽당유한원방진모형양본수거병진행계산,대계산결과응용Kriging모형、최소이승향응면모형、경향기함수모형구건전부결구질량、B주가속도최대치화전부결구최대흡능상대우각부건후도적삼충근사모형。이B주가속도최대치위목표,약속전부결구최대흡능、전부결구령건질량급각령건후도,이용모의퇴화산법화삼충공간밀집살점우화수색방법,최종득도일조최우적전부령건후도조합,사득B주가속도최대치최소。연구표명,해방법계산정도화효솔교호지만족료내당성공정설계적수구。
The thicknesses of vehicle front parts were defined as variables,and 100 points of vehicle front crash finite element models were sampled by the Latin hypercube design of experimental method.The Kriging model,LSR model and RBF model were then applied to construct the approximate models of the weight of front structure,the maximal acceleration of B pillar and the maximal absorbed energy of front structure according to the FEM simulation results.In the optimization of maximal acceleration of B pillar,the weight of front structure,the maximal absorbed energy of front structure and the thickness of vehicle front parts were constrained.Then,an ASA algorithm and searching the best result in a large number of samples in three spaces were adopted to minimum the maximal acceleration of B pillar and find an optimal thickness of the front parts.The study shows that the precision and efficiency of this method is good and can meet the crashworthiness engineering requirements.