<DIV align="center">
<DIV align="center">考虑冲压残余应力和厚度变化的车身结构模态分析与优化

考虑冲压残余应力和厚度变化的车身结构模态分析与优化

廖代辉;成艾国;谢慧超

振动与冲击 ›› 2010, Vol. 29 ›› Issue (3) : 30-33.

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振动与冲击 ›› 2010, Vol. 29 ›› Issue (3) : 30-33.

论文

考虑冲压残余应力和厚度变化的车身结构模态分析与优化

廖代辉 ; 成艾国 ; 谢慧超

作者信息 +

Modal Analysis and optimization for Auto-Body Structure with consideration of Residual Stress and Thickness Changes in Stamping

Liao Daihui ; Cheng Aiguo ; Xie Huichao

Author information +

文章历史 +

摘要

车身零件冲压成形过程中产生的残余应力和厚度变化对其结构模态和固有频率具有重要的影响，而目前常用的有限元模态分析方法中，常常忽略了成形因素所带来的影响，导致分析结果与实际情况不相符。采用有限元网格映射算法，在车身结构模态分析中引入成形信息，并将成形残余应力作为预应力施加，研究成形因素对车身结构模态和固有频率的影响。研究结果表明，考虑成形比未考虑成形影响的模态分析结果更接近实验结果。最后，进行了基于成形因素的车身结构灵敏度分析与优化。

Abstract

The Residual Stress and Thickness Changes in Stamping of auto-body parts will effect in the modal and inherence frequency of Auto-Body Structure significantly. But it was usually neglected in the FEM modal analysis today. This neglect will result in differences of the analysis and practice station by used. A grid mapping method was proposed to consider the forming results and impose the residual stress as initial stress. The study results indicate that the analysis which including forming effects is more approached to the test. And then, the sensitivity analysis and optimization on car body was proposed based on the forming effects.

导出引用

廖代辉;成艾国;谢慧超.

考虑冲压残余应力和厚度变化的车身结构模态分析与优化[J]. 振动与冲击, 2010, 29(3): 30-33

Liao Daihui;Cheng Aiguo;Xie Huichao. Modal Analysis and optimization for Auto-Body Structure with consideration of Residual Stress and Thickness Changes in Stamping[J]. Journal of Vibration and Shock, 2010, 29(3): 30-33