中国机械工程 ›› 2011, Vol. 22 ›› Issue (12): 1476-1479.

• 机械基础工程 • 上一篇    下一篇

随机梁式结构特征值的子结构递推求解方法

万信华1,2;黄斌3;高洪波4
  

  1. 1.华中科技大学,武汉,430074
    2.中铁第四勘察设计院集团有限公司,武汉,430063
    3.武汉理工大学,武汉,430070 4.中交第二公路勘察设计研究院有限公司,武汉,430052
  • 出版日期:2011-06-26 发布日期:2011-07-01
  • 基金资助:
    国家自然科学基金资助项目(51078297)
    National Natural Science Foundation of China(No. 51078297)

Statistic Eigenvalue Analysis of Random Beam Structures Based on Substructure Recursive Approach

Wan Xinhua1,2;Huang Bin3;Gao Hongbo4
  

  1. 1.Huazhong University of Science and Technology,Wuhan,430074
    2.China Railway Siyuan Survey and Design Group Co. Ltd.,Wuhan,430063
    3.Wuhan University of Technology,Wuhan,430070
    4.China Communications Second Highway Survey Design and Research Institute Co. Ltd.,Wuhan,430052
  • Online:2011-06-26 Published:2011-07-01
  • Supported by:
    National Natural Science Foundation of China(No. 51078297)

摘要:

将递推随机有限元法和子结构模态综合法结合起来,提出了求解随机梁式结构特征值的子结构递推求解方法。算例表明,对于较宽随机涨落范围内的随机特征值求解问题,子结构递推求解方法相对于传统的基于一阶、二阶泰勒展开的摄动随机方法而言,其结果能够更好地逼近蒙特卡罗模拟解。
 

关键词:

Abstract:

A new numerical method,called as substructure recursive stochastic finite element method,which combined component modal synthesis method with recursive stochastic finite element method,was employed to study eigenvalue problems of random beam structures.The numerical examples of truss cantilever beam show that,compared with perturbation stochastic substructure method based on the first or second order of Taylor expansions, the results of the substructure recursive stochastic finite element method supposed herein are more close to that of Monte-Carlo simulation method in wide range of random fluctuation. 

Key words:

perturbation

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