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微分求积有限梁单元 被引量:2

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摘要 根据微分求积有限单元方法(DQFEM)推导了微分求积有限Euler-Bernoulli梁单元。不论对于C0类还是C1类单元,微分求积有限单元的试函数都是Lagrange插值函数,而在标准有限元方法(SFEM)中,二者要分别采用Lagrange和Her-mite插值函数。并且,微分求积有限单元不需要结点形函数,刚度和质量矩阵可以简单地写成微分求积系数矩阵和Gauss-Lobatto积分权系数矩阵的乘积,从而简化结构矩阵的计算,这对构造高阶单元是有益的。用高阶单元和2结点微分求积有限梁单元求得了固有频率并与SFEM的结果和精确解进行了比较,结果说明DQFEM具有更高的精度。
作者 柳广
出处 《江苏科技信息》 2012年第6期55-57,共3页 Jiangsu Science and Technology Information
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