| 樊建平,章建军.用显格式技术对复杂结构准静态加载的有限元模拟[J].计算力学学报,2002,19(4):431~437 |
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| 用显格式技术对复杂结构准静态加载的有限元模拟 |
| Slow-dynamic finite element simulation with explicit time integration |
| 修订日期：2001-01-16 |
| DOI：10.7511/jslx20024092 |
| 中文关键词: 显格式技术,准静态,时间历程,惯性效应,线性弹簧振子 |
| 英文关键词:explicit technique,quasi\|static,time history profile,inertia effect,linear oscillator |
| 基金项目: |
| 樊建平 章建军 |
华中科技大学土木工程与力学学院 武汉430074
(樊建平，章建军)
，华中科技大学土木工程与力学学院 武汉430074(陈传尧)
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| 摘要点击次数: 1181 |
| 全文下载次数: 8 |
| 中文摘要: |
| 在强非线性有限元分析中 ,当采用隐格式方法得不到预期结果时 ,显格式技术是解决问题的有效途径之一。采用显格式分析方法 ,要解决两个问题 ,一是合理选择载荷作用时间 ;二是控制系统的惯性效应。本文选用了 5个时间历程函数 ,首先将它们应用于线性弹簧振子分析中 ,得到了响应的解析表达式并做了误差分析 ,通过作图的方式 ,显示了各函数动静模拟的优劣。根据对线性弹簧振子的分析 ,得到了选择载荷作用时间的重要参数——线性系统的最小自然周期。随后对带孔口的薄板平面应力问题做非线性有限元动静分析 ,得到了一些有价值的结论 ,可供工程应用参考 |
| 英文摘要: |
| The explicit time integration for the finite element non\|linear analysis is available when the implicit technique suffers some difficulty with static process in the solid and structural mechanics. The key factor in this slow\|dynamic technique is how to choose the load duration and minimize the undesired dynamic effect originated from the inertia force of the governing equation. In this paper, five time history profiles have applied and its techniques and guidelines are presented. The effect of the duration and functional from of the time histories of loads and boundary conditions is quantified by the analysis of a linear spring mass oscillator. The resulting guidelines and techniques are successfully demonstrated in the non\|linear finite element simulation of plane stress for the sheet plate operation. The error measures that quantify the dynamic effect are also discussed. Some valuable suggestion is given in this researching field. |
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