| 应用DQE增量迭代法分析斜直井内管柱的非线性屈曲 |
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| 引用本文： | 甘立飞,王鑫伟,谈梅兰. 应用DQE增量迭代法分析斜直井内管柱的非线性屈曲[J]. 计算物理, 2009, 26(1): 129-134 |
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| 作者姓名： | 甘立飞 王鑫伟 谈梅兰 |
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| 作者单位： | 1. 南京航空航天大学航空宇航学院, 江苏 南京 210016;2. 江苏大学理学院, 江苏 镇江 212013 |
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| 基金项目： | 江苏省高校自然科学研究计划，美国Smith Tool公司资助项目 |
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| 摘 要： | 基于斜直井内管柱屈曲的平衡微分方程,构建DQE (Differential Quadrature Element)增量迭代法,对斜直井内管柱的非线性屈曲进行计算.通过与有限元的计算结果对比,验证方法的正确性.DQE法方法简单、易于实施,计算量少、精度较高,所得到的螺旋屈曲计算结果与实验结果吻合,最大井壁约束力随上端载荷的增加而增大.对于工程中比较长的受压段管柱,其屈曲是一个局部非线性稳定性问题,屈曲首先从下端开始发生,随着上端载荷的增加,逐渐向上扩展;上端边界条件对下端局部屈曲无明显影响.
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| 关 键 词： | 管柱 非线性 屈曲 DQE法 约束 |
| 收稿时间： | 2007-08-09 |
| 修稿时间： | 2007-11-19 |
Nonlinear Buckling Analysis of Tubular in a Deviated Well with Differential Quadrature Element Incremental Iteration Method |
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| GAN Lifei,WANG Xinwei,TAN Meilan. Nonlinear Buckling Analysis of Tubular in a Deviated Well with Differential Quadrature Element Incremental Iteration Method[J]. Chinese Journal of Computational Physics, 2009, 26(1): 129-134 |
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| Authors: | GAN Lifei WANG Xinwei TAN Meilan |
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| Affiliation: | 1. College of Aerospace Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China;2. Faculty of Science, Jiangsu University, Zhenjiang 212013, China |
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| Abstract: | Equilibrium equations of tubular in a deviated well are presented.A differential quadrature element(DQE)incremental iteration method is established to analyze nonlinear buckling of tubular in a deviated well.The method is verified with result of finite element method.It exhibits advantages of easy implementation,low computational cost and higher accuracy.Helical buckling by DQE agrees well with experimental data.The maximum constraint force increases with increasing of upper end load.It is found that the bu... |
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| Keywords: | tubular nonlinear buckling differential quadrature element method constraints |
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