力学与实践 ›› 2008, Vol. 30 ›› Issue (6): 31-34.DOI: 10.6052/1000-0879-2008-008

• 应用研究 • 上一篇    下一篇

基于变形修正的局部刚体化动力模型简化方法

郑淑飞 丁桦   

  1. 中国科学院力学研究所工程科学部,北京 100080 中科院力学所 北京 100080
  • 收稿日期:2008-01-02 修回日期:2008-02-21 出版日期:2008-12-08 发布日期:2008-12-08

A MODEL REDUCTION METHOD FOR DYNAMIC ANALYSIS BASED ON DEFORMATION MODIFICATION AND LOCAL RIGID BODY MODE

  • Received:2008-01-02 Revised:2008-02-21 Online:2008-12-08 Published:2008-12-08

摘要: 提出一种基于变形修正的动力模型简化方法. 以复杂工程结构的有限元模型为基础,根 据运动同步性假设将结构分成若干同步性区域. 采用适当的位移模式去逼近位移真值,再通 过总体应变能最小来优化,从而得到整体位移与局部位移模式间的转换关系. 算例结果 表明了简化方法的有效性.

关键词: 模型简化,变形修正,总体应变能,优化

Abstract: A new model reduction method based on deformation modification is presented for dynamic analysis. Complex structures can be divided into several displacement synchronous parts by analyzing the finite element models based on a synchronistic assumption. The displacement can be approached by an appropriate mode, and the transformation relationship between global displacement and local displacement can be obtained by minimizing Global Strain Energy. The results of examples show the validity of the method.

Key words: model reduction, deformation modification, global strain