含焊接残余应力的结构模型参数修正研究

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摘要提出考虑焊接残余应力的结构模型参数修正方法。在预应力分布模型基础上建立含焊接残余应力的结构刚度矩阵方程，分析了焊接残余应力对结构刚度及结构振动特性的影响；以消除焊接残余应力对数值计算规模和计算精度的影响为目标。应用结构优化算法，以结构固有频率残差最小化为目标，开展有限元模型的结构参数修正研究；最后，以圆柱壳结构为例，实施基于结构模型参数修正的优化计算，验证方法的可行性。

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	陈炉云
	郭永晋
	易宏

关键词 ：模型参数修正, 焊接残余应力, 预应力刚度矩阵, 模型重构

Abstract：A structural model parameter updating method was proposed in present research.To improve the accuracy for the finite element model, the welding residual stress distribution problem was considered.The pre-stress matrix function was established based on the pre-stress distribution model, the influence of welding residual stress on structural stiffness and structural dynamic characteristic were discussed.In order to eliminate the influence of welding residual stress on the calculation scale and calculation?precision of complex structure, the structural model parameter updating was carried out by using the structural optimization strategy, in which to minimize the residual value of natural frequency parameter was defined as objective function.Finally, a cylindrical shell structure for example, the optimization calculation based on model parameter updating was carried out, and the feasible of the proposed method was verified.

Key words： model parameter updating welding residual stress pre-stress matrix reverse design

收稿日期: 2018-07-24 出版日期: 2020-04-15

引用本文:

陈炉云，郭永晋，易宏. 含焊接残余应力的结构模型参数修正研究[J]. 振动与冲击, 2020, 39(8): 245-249.
CHEN Luyun, GUO Yongjin, YI Hong. Model parameter updating study consideration of welding residual stress distribution. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(8): 245-249.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2020/V39/I8/245

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