一种薄壳厚壳通用的轴对称曲壳单元

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．

A new axisymmetric curved shell element for thin/thick shell

When using FEM to analyze the axisymmet- ric 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.