A formula based on the interpolation for the rank of the element stiffness matrix is presented, and some reduced integration elements are examined.
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。
At least one body has been found to have only 1 element in at least 2 directions along with reduced integration.
至少一个尸体被发现只有1元素至少2方向以及减少集成。
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