中国民航大学学报

• 基础科学 • 上一篇    下一篇

一种简化的区间B 样条小波杂交应力元

卿光辉,张春潮   

  1. (中国民航大学航空工程学院,天津300300)
  • 收稿日期:2014-12-15 修回日期:2015-01-04 出版日期:2015-12-23 发布日期:2015-12-24
  • 作者简介:卿光辉(1968—),男,湖南新化人,教授,博士,研究方向为结构力学.
  • 基金资助:

    国家自然科学基金项目(60979001)

Simplified interval B-spline wavelet on interval hybrid stress element

QING Guang-hui,ZHANG Chun-chao   

  1. (College of Aeronautical Engineering,CAUC,Tianjin 300300,China)
  • Received:2014-12-15 Revised:2015-01-04 Online:2015-12-23 Published:2015-12-24

摘要:

结合杂交应力元理论,分别以2 阶、4 阶0 尺度小波函数为基础,构造了一种对应于杂交应力元的简单形函数。这种形函数不仅克服了区间网格数成2 的指数级增加而导致未知量增加的困难,同时简化了计算过程。为了验证理论的正确性,分析了二维弹性板在承受均布载荷下中线位移和应力的情况。在相同网格数的情况下,4 阶小波尺度函数构造的杂交应力元计算结果比2 阶的计算结果更加准确。

关键词: 有限元, 杂交应力元, 小波函数, 形函数

Abstract:

Combining with the hybrid stress finite element theory,based on 2-order/4-order 0 scale wavelet functions,a type of shape function is presented and the process of computer is reduced. The shape function can overcome the difficulty of unknown number increase exponentially with 2 to the power of n. In order to verify the correctness of current formulation,the median displacement and stress of 2 -D elastic rectangular plate under uniformly distributed load is analyzed with different meshes. With the same mesh,the results of 4-order wavelet function are more accurate than that of 2-order wavelet function.

Key words: finite element, hybrid stress element, wavelet function, shape function

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