| 陈万吉.单变量有限元的新思考:精化直接刚度法[J].计算力学学报,1993,10(4): |
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| 单变量有限元的新思考:精化直接刚度法 |
| New Ideology of the Single Variable Model:the Refined Direct Stiffness Method |
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| DOI：10.7511/jslx19934059 |
| 中文关键词: 单变量有限元,多变量有限元,精化直接刚度法 |
| 英文关键词:single variable model, multivariable model, finite element method, refined direct stiffness method |
| 基金项目:国家自然科学基金 |
| 陈万吉 |
| 大连理工大学工程力学研究所 大连 |
| 摘要点击次数: 1145 |
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| 中文摘要: |
| 对单变量有限元和多变量有限元进行了综合分析和比较。其中包括有限元法的单元的可靠性问题:收敛性,坐标不变性,伪零能模式;单元的性能:计算精度,对畸变网格的适应性及解除闭锁、解的晃动现象等问题。进一步对单变量有限元提出新的思考,用精化直接刚度法发展单变量有限元,使之能兼备单变量有限元与多变量有限元之长,克服两者之短。 |
| 英文摘要: |
| Integrated analysis and comparison of the single model and multivariable models of the finite element method are given in which the element reliability such as convergence, coordinate invariance and extra zero energy models and the performances of the element such as accuracy, sensitivity to geometric distortion, free form locking and solution oscillation have been discussed.An approach for improving the single variable model which is the refined direct stiffness method is suggested. |
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