摘要
本文研究了薄厚板壳有限单元统一性理论中，由于采用降阶积分而使得刚度矩阵产生奇异的问题。得到了根据插值函数来计算刚度矩阵秩的计算公式，并对几种降阶积分单元进行了验算。
The singularity of thick and thin plate element stiffness matrix due to the use of the reduced integration on the basis of the finite element is investigated.A formula based on the interpolation for the rank of the element stiffness matrix is presented,and some reduced integration elements are examined.
出处
《工程力学》
EI
CSCD
北大核心
1998年第3期44-50,共7页
Engineering Mechanics
关键词
降阶积分
罚函数
奇异性
薄板壳
有限元
reduced integration,penalty function,singularity,spurious zero energy mode
