基于响应面法的某车身多学科数值优化

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中图分类号：U462.3；TP391.99 文献标志码：B

Multidiscipline numerical optimization of a certain body based on response surface method

ZHANG Feng'， WANG Deyuan1， YAO Zaiqi

（1.Chongqing Livan Automotive Research Institute Co.，Ltd.，Chongqing 40O7OO，China； Ningbo Geely Automobile Research and Development Co.，Ltd.，Ningbo 315OOO，Zhejiang，China）

Abstract： In order to balance the noise，vibration，harshness （NVH） performance and quality of a specific vehicle model，the NVH performance multidisciplinary optimization of the vehicle body is studied by response surface method. First， the basic performances of BIP mode，trimmed body（TB）dynamic stifess and noise transfer function（NTF）are analyzed； then，the body sheet metal material thickness as design variables，design of experiment（DOE）is carried out by optimal Latin method；finally，through secondary development and mode tracking，optimized responses are obtained，response surface models are created，and multi-disciplinary optimization is conducted. The results show that the weight of the car body is reduced by 7.4kg and the rate of lightweight is 3.8% ：

Key words： trimmed body（TB）； dynamic stiffness； noise transfer function（NTF）； response surfacemethod ； multi-disciplinary optimization

0 引言

其中，噪声、振动和粗糙度（noise、vibration、harshness，NVH）性能是整车性能非常重要的参数，而模态、动刚度和噪声传递函数（noisetransfer在汽车研发过程中，车身性能的优化至关重要，function，NTF）是判断车身NVH性能好坏的3个重要指标[1]

为实现更优的车身质量和性能，必须采用先进的优化方法。（剩余5193字）