摘要
通过计算不同初应力下结构的固有频率，分析残余应力对自振频率的影响，以便通过分析固有频率来估算残余应力。
The paper calculates natural frequency of the structure with different initial stress state and then analyzes the influence of residual stress to free vibration frequency.Through further analysis of natural frequency,the residual stress can approximately obtained.
关键词
有限元
残余应力
固有频率
金属结构
nonlinear finite element,residual stress,natural frequency
