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Applied Mathematics and Mechanics (English Edition) ›› 2010, Vol. 31 ›› Issue (11): 1337-1346.doi: https://doi.org/10.1007/s10483-010-1366-x

• Articles •    下一篇

Improvement of FEM´s dynamic property

江增荣1 段鹏飞2 郭杏林3 丁桦2   

  1. 1. The Second Research Department, Equipment Research Institute of PLA’s Second Artillery, Beijing 100085, P. R. China;
    2. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, P. R. China;
    3. Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, Liaoning Province, P. R. China
  • 收稿日期:2010-07-19 修回日期:2010-09-27 出版日期:2010-11-01 发布日期:2010-11-01

Improvement of FEM´s dynamic property

JIANG Zeng-Rong1, DUAN Peng-Fei2, GUO Xing-Lin3, DING Hua2   

  1. 1. The Second Research Department, Equipment Research Institute of PLA’s Second Artillery, Beijing 100085, P. R. China;
    2. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, P. R. China;
    3. Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, Liaoning Province, P. R. China
  • Received:2010-07-19 Revised:2010-09-27 Online:2010-11-01 Published:2010-11-01

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摘要： The discretization size is limited by the sampling theorem, and the limit is one half of the wavelength of the highest frequency of the problem. However, one half of the wavelength is an ideal value. In general, the discretization size that can ensure the accuracy of the simulation is much smaller than this value in the traditional finite element method. The possible reason of this phenomenon is analyzed in this paper, and an efficient method is given to improve the simulation accuracy.

Abstract: The discretization size is limited by the sampling theorem, and the limit is one half of the wavelength of the highest frequency of the problem. However, one half of the wavelength is an ideal value. In general, the discretization size that can ensure the accuracy of the simulation is much smaller than this value in the traditional finite element method. The possible reason of this phenomenon is analyzed in this paper, and an efficient method is given to improve the simulation accuracy.

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