Aiming at the problem of low-frequency noise control of door-slamming, an optimization procedure is established. Firstly, the kinetic energy of door-slamming and the reactive force of door lock are calculated by using explicit finite element method; Then with minimizing the kinetic energy of door-slamming as objective, the thicknesses of main panels as design variables, an optimization model is built based on response surface method with the design of experiment, an optimization is conducted using genetic algorithm, and the optimized values of main panel thicknesses are obtained. Finally with a specific car as real example, an optimization on the kinetic energy of door-slamming and a numerical analysis on the sound pressure level of door radiation noise with indirect boundary element method are carried out. The results show that the low-frequency noise of door-slamming is obviously reduced.%针对汽车关门低频噪声的控制问题,建立了一套优化流程.首先采用显式有限元法计算汽车关门动能和门锁反力；然后以关门动能最小为目标,以车门主要板件厚度为设计变量,在试验设计的基础上采用响应面法建立优化模型,用遗传算法进行优化,得到车门主要板件厚度的优化值.最后以某车型为实例进行关门动能优化,用间接边界元法对车门的辐射噪声声压级进行了数值分析,结果表明:该车型优化后的关门低频噪声明显减小.
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