| 强天驰,寇晓东,周维垣.三维有限元网格加密方法及其工程应用[J].水利学报,2000,31(7):0038-0044 |
| 三维有限元网格加密方法及其工程应用 |
| The mesh densification method for 3-D FEM and its application |
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| DOI： |
| 中文关键词: 三维有限元 位移协调 网格加密 界面单元 最小势能原理 |
| 英文关键词: 3-D FEM displacement consistency mesh densification theory of minimum potential energy |
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| 摘要点击次数: 1858 |
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| 中文摘要: |
| 本文利用最小势能原理将三维有限元的疏密网格通过界面单元耦合起来，解决了网格突变情况下的位移协调问题，简化了有限元网格的局部加密问题，从而协调了计算精度与效率之间的矛盾.通过算例把本文推荐的方法与精确解和普通有限元解作了对比，验证了方法的合理性。 |
| 英文摘要: |
| On the basis of the minimum potential energy theory, the coarse mesh and fine mesh of 3-D FEM are coupled by interface elements to solve the problem of the displacement consistency between meshes with different densities. The problem of local densification in FEM is simplified and the contradiction between calculation accuracy and efficiency is also coordinated. The validity of this proposed method is verified by the comparisons of calculated results with theoretical solution and the result by means of ordinary FEM. |
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