减缩积分比较常用,虽然有可能导致“零能模式”(zero energy mode),但一般是在板壳较厚且单元很少时发生,这在实际情况中出现的较少,且板壳较厚时可选则完全积氛辏
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The examples show that the new element AT4 has better precision than the element without the drilling degree of freedom, and no spurious zero energy mode. Its disadvantage is that stiffness matrix is too rigid to use in some cases.3.
算例表明,此单元无多余的零能模式,精度较无旋转自由度的膜元有所提高,不足之处是单元较刚。
参考来源 - 基于薄壳有限元法的带旋转自由度膜元研究·2,447,543篇论文数据,部分数据来源于NoteExpress
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