| 焊接结构应力场计算中的一类五面体可变节点等参单元 |
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| 引用本文： | 管德清,颜国良,汪广海. 焊接结构应力场计算中的一类五面体可变节点等参单元[J]. 计算力学学报, 1994, 11(1) |
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| 作者姓名： | 管德清 颜国良 汪广海 |
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| 作者单位： | 长沙水利电力师范学院力学教研室，中国船舶科学研究中心 |
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| 摘 要： | 本文应用三维有限元理论，构造了一类五面体６～１５节点等参单元的形函数，提出了在五面体单元内的Ｇａｕｓｓ积分处理方法，建立了相应的单元刚度矩阵。这类单元的节点可以在６～１５之间任意选择。将其与ＳＡＰ５中的六面体８～２１节点等参单元匹配，计算了对接板接头的理论应力集中系数。经与有关文献结果比较表明：这类单元适合于计算焊接结构的应力场，并且具有良好的精度。
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| 关 键 词： | 五面体，可变节点，形函数，单元刚度矩阵，焊接结构 |
A Triangular prism variable Nodes Isoparameter Element; for Calculation of Stress Field in Welded Structure |
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| Guan Deqing:Yan Guoliang. A Triangular prism variable Nodes Isoparameter Element; for Calculation of Stress Field in Welded Structure[J]. Chinese Journal of Computational Mechanics, 1994, 11(1) |
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| Authors: | Guan Deqing:Yan Guoliang |
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| Abstract: | The shape functions and stiffness matrixes of the tfiangular prism isoparameter elements( 6 to 15 nodes )are developed in this paper from 3-D finite element theories,This nodes ofthe elements are variable and arbitrary.A calculating method for Gauss integral in triangularprism are presented.The stress concentration factors of plate welded joints have been calcu-lated by the triangular prism isoparameter elements and hexahedron isoparameter elements(8 to 21 nodes)in SAP5. It is shown that the stress field of welded structure can be calculat-ed by the two types of elements and the results have high accuracy from the calculation inthis paper. |
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| Keywords: | triangular prism variable nodes shape function stiffness matrix of element welded structure |
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