基于6σ 的车身噪声传递函数稳健优化设计

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (14) : 155-159.

论文

基于6σ 的车身噪声传递函数稳健优化设计

聂祚兴1，于德介2，周建文1，周舟1

作者信息 +

Robust optimization design for car bodies’ noise transfer functions based on six sigma

NIE Zuo-xing1，YU De-jie2，ZHOU Jian-wen1，ZHOU Zhou1

Author information +

文章历史 +

摘要

为提高设计稳健性，将6 稳健优化设计引入车身噪声传递函数优化过程。将6 质量管理、可靠性设计与稳健设计相结合，考虑设计变量、约束条件及目标函数在内所有不确定性信息，不仅满足优化目标函数、提高系统可靠性要求，亦使系统响应均方差最小化，即提高稳健性。以某型汽车为例，在汽车声固耦合有限元模型基础上采用基于试验设计的二阶多项式响应面模型，以车身总质量及一阶模态频率为约束条件、驾驶员耳旁声压级响应均方根值为目标函数，在基本随机变量概率特性已知情况下，对车身噪声传递函数进行6 稳健优化设计，与传统确定性优化设计相比表明该方法的有效性。

Abstract

In order to improve the design robustness of the vehicle’s NVH performance, a six sigma robust optimization method is introduced into the optimization process of noise transfer functions. In this method, the influence of various uncertain factors which result from objective functions, design variables and constraint conditions are considered by integrating six sigma quality management approach, reliability design approach and robust design approach into the optimization design process. Therefore, not only the proper optimal solution and reliability of system are achieved but also the robustness of production design process is improved. Based on the acoustic-structure coupling finite element model and the quadratic response surface approximate model, the proposed method is implemented to optimize the noise transfer function of a car body. In this numerical example, the probabilistic characteristics of the design variables are known, total mass and the first natural frequency of a car body are considered as constrains, and the root mean square value of SPL measured near the driver’s ear is defined as the objective function. The result verifies the accuracy and efficiency of the proposed method, compared with traditional deterministic optimization design.

导出引用

聂祚兴;于德介;周建文;周舟. 基于6σ 的车身噪声传递函数稳健优化设计[J]. 振动与冲击, 2014, 33(14): 155-159

NIE Zuo-xing;YU De-jie;ZHOU Jian-wen;ZHOU Zhou. Robust optimization design for car bodies’ noise transfer functions based on six sigma [J]. Journal of Vibration and Shock, 2014, 33(14): 155-159