基于Hyperworks的汽车背门扭转模态频率灵敏度分析

采用一种新的方法进行汽车背门扭转模态频率的灵敏度分析,将内蒙皮划分为不同的区域,以厚度的变化来表示表面特征变化所带来的刚度变化.对背门的各个加强件和内蒙皮的不同区域的厚度进行参数化.利用Hyperworks软件进行灵敏度分析,精确求解出加强件的贡献大小与内蒙皮各个部位的贡献大小.对于正因子部件要其提高刚度,负因子部件则要消弱其刚度.分析结果精确地指出了下一轮设计的重点部位.

Sensitivity Analysis of Torsion Mode Frequency of Car Rear Door Based on Hyperworks Software

This paper applies a new method in conducting the sensitivity analysis of torsion mode frequency of the inner skin of car rear door.Firstly,the inner skin is divided into different regions,and the changes of stiffness resulting from altering the surface features can be indicated by the changes of thickness.Then the thickness of the reinforcement parts and the different regions of the inner skin will be parameterized.By using Hyperworks for sensitivity analysis,the amount of contribution to the stiffness of the reinforcement parts and the regions of the rear door’s inner skin can be precisely calculated,which finds the stiffness should be improved if the part’s contribution is positive,or vice versa.The analysis result points out the key points for the next round design.