Verification of finite element elastic-plastic buckling analysis of square steel tube column using solid element
Verification of finite element elastic-plastic buckling analysis of square steel tube column using solid element
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方钢管柱有限元弹塑性屈曲分析的实体单元验证
DOI：
10.11421/jsces.2013.20130001
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发表时间：
2013
影响因子：
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通讯作者：
山下拓三，宮村倫司，秋葉博，梶原浩一
中科院分区：
文献类型：
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作者：
Kozo NAKADA;Yoichi MORISHITA;Sanae UEHARA;Tetsuo YAMAKAWA;幸地優明，中田幸造，森下陽一;中田幸造，森下陽一，前田興輝;山下拓三，宮村倫司，秋葉博，梶原浩一
并行计算的最新进展使得能够使用实体单元对钢框架进行精确的有限元分析。然而，分析中使用的有限元模型尚未得到充分验证。在这项研究中，首先，静态有限元弹塑性屈曲分析的方钢管柱进行了规定的横向位移与不同的网格，以验证分析模型。结果表明，分析的精度和计算时间不仅取决于网格划分的数量，但也对每个有限元的纵横比。然后，对不同网格和不同时间增量下的动力弹塑性屈曲进行了分析。动力屈曲问题是一种慢动力学问题，采用细网格可以得到精确的结果，但需要较大的时间增量。
Recent advancement in parallel computing enables the precise finite element analysis of steel frames using solid elements. However, the finite element models used in the analysis have not been verified sufficiently. In this study, first, static finite element elastic-plastic buckling analyses of a square steel tube column subjected to a prescribed lateral displacement are performed with different meshes in order to verify the analysis model. It is shown that the accuracy and computation time of the analysis depend not only on the number of mesh divisions but also on the aspect ratio of each finite element. Then, dynamic elastic-plastic buckling analyses are performed for different meshes and different time increments. In the dynamic buckling problem, which is a kind of slow dynamics problem, accurate results can be obtained using a fine mesh but with a rather large time increment.