基于Kriging模型的车门刚度和模态优化  

Stiffness and Modal Optimization of Car Door Based on Kriging Model

作　　者：朱茂桃[1] 钱洋[1] 顾娅欣[1] 周泽磊[1] 刘雪莱[1] 

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013

出　　处：《汽车工程》2013年第11期1047-1050,1042,共5页Automotive Engineering

摘　　要：在Hypermesh中建立车门的有限元分析模型,利用Optistruct求解器进行灵敏度分析。以关键钣件厚度为设计变量,采用拉丁方试验设计法生成100个样本点并进行计算,对计算结果应用Kriging模拟法构建了车门质量、扭转刚度和1阶固有频率的近似模型。以车门质量最轻为目标,以车门扭转刚度、1阶固有频率为约束,应用序列二次规划法进行性能优化,最终得到一组车门钣件厚度的最优组合,在满足扭转刚度和模态性能要求的同时,使车门质量降低2.38%。灵敏度分析法和Kriging模型的结合确保了优化效率和精度。A finite element model for car door is created with Hypermesh software and a sensitivity analysis is conducted by using Optistruct solver. Taking thicknesses of key panels as design variables, 100 sample points 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 mass, torsional stiffness and first-order natural frequency based on calculated results. An optimization is then performed by using sequential quadratic programming with minimizing mass as objective, torsional stiffness and the first-order natural frequency as constraints, and a set of optimum combination of panel thicknesses is finally obtained, making the mass of car door reduces by 2.38% while meeting the requirements on torsional stiffness and modal performance. The combination of sensitivity analysis and Kriging model ensures the efficiency and accuracy of optimization.

关 键 词：车门 灵敏度分析 拉丁方试验设计 KRIGING模型 优化 

分 类 号：U463.834[机械工程—车辆工程]