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

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Journal of Vibration and Shock ›› 2010, Vol. 29 ›› Issue (3) : 30-33.

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

Liao Daihui ; Cheng Aiguo ; Xie Huichao

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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.

Key words

Sheet Metal Forming / Residual Stress / Modal Analysis / Sensitivity Analysis / Structure Optimization

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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