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力学与实践 ›› 2004, Vol. 26 ›› Issue (1): 0-0.doi: 10.6052/1000-0992-2002-405

• 应用研究 •    

一种薄壳厚壳通用的轴对称曲壳单元

李革 杨志军 张永红   

  1. 内蒙古科技大学建筑与土木工程学院工程力学系,包头,014010 包头钢铁学院建工院工程力学系 包头钢铁学院建工院工程力学系
  • 收稿日期:2002-11-22 修回日期:2003-04-04 出版日期:2004-02-10 发布日期:2004-02-10

A NEW AXISYMMETRIC CURVED SHELL ELEMENT FOR THIN/THICK SHELL

  • Received:2002-11-22 Revised:2003-04-04 Online:2004-02-10 Published:2004-02-10

摘要: 有限元法分析轴对称壳体时,常需区分薄壳和厚壳并选用不同的单元,给计算带来不便. 为此,通过对现有的轴对称壳体单元的研究,基于加权残值法,将广义协调条件引入剪应变场, 构造了一种挠度和转角各自独立的新型轴对称曲壳单元. 算例结果表明,新单元具有很 高的精度,既可用于厚壳,也可用于薄壳. 该单元可用于轴对称壳体结构的计算分析.

关键词: 加权残值法,广义协调条件,曲壳单元

Abstract: When using FEM to analyze the axisymmetric shell, we not only need to distinguish thin and thick shells, but also to select and use different elements, which seems to be inconvenient for us. In order to solve this problem, it's of great significance for us to build up an element of high precision applicable to both thin and thick shell. For this reason, a new axisymmetric curved shell element with independent deflection and slope is presented by means of introducing generalized conforming condition into shear strain and displacement. Numerical examples show the new element exhibits higher precision and suits to both thin and thick shell. The element is also applicable to the calculation and analysis of the axisymmetric shell structure.

Key words: moehod of weighted residuals, generalized conforming condition, curved