| 钻柱非线性螺旋屈曲准静态加载模型的数值验证 |
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| 引用本文： | 刘峰,王鑫伟,甘立飞.钻柱非线性螺旋屈曲准静态加载模型的数值验证[J].南京航空航天大学学报,2006,38(4):469-473. |
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| 作者姓名： | 刘峰 王鑫伟 甘立飞 |
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| 作者单位： | 1. 中国民航飞行学院航空工程学院,广汉,618307
2. 南京航空航天大学航空宇航学院,南京,210016 |
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| 基金项目： | 美国Smith Tool公司资助项目 |
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| 摘 要： | 采用有限元法对等曲率井中钻柱非线性螺旋屈曲准静态加载模型的控制微分方程进行了求解,对准静态加载模型的合理性进行了数值验证,力学模型中考虑了钻柱的重力,澄清了钻柱螺旋屈曲特征值问题和准静态加载问题的理论基础。分析表明,等曲率井中钻柱的螺旋屈曲过程是一个稳定的加载过程,将等曲率井中钻柱的螺旋屈曲问题作为一个准静态加载问题来分析是合理的,采用准静态加载模型计算得到的钻柱初始失稳载荷与钻柱正弦屈曲线性特征值问题的分析结果吻合。
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| 关 键 词： | 工程力学 数值验证 有限元法 钻柱 等曲率井 非线性 螺旋屈曲 |
| 文章编号： | 1005-2615(2006)04-0469-05 |
| 收稿时间： | 2005-09-21 |
| 修稿时间： | 2006-02-21 |
Numerical Verification of Quasi-Static Loading Model for Nonlinear Helical Buckling of Tubing in Constant-Curvature Wells |
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| Liu Feng,Wang Xinwei,Gan Lifei.Numerical Verification of Quasi-Static Loading Model for Nonlinear Helical Buckling of Tubing in Constant-Curvature Wells[J].Journal of Nanjing University of Aeronautics & Astronautics,2006,38(4):469-473. |
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| Authors: | Liu Feng Wang Xinwei Gan Lifei |
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| Abstract: | The governing differential equilibrium equations of the quasi-static loading model for nonlinear helical buckling of tubing in constant-curvature wells are solved by the finite element method.The rationality of the quasi-static loading model for helical buckling of tubing is verified.The effect of tubing gravity is included in the analysis.The theoretical bases of the quasi-static loading problem and the eigenvalue problem of drill-tubing helical buckling are presented.It is shown that the helical buckling process of tubing in constant-curvature wells is a stable loading process.It is reasonable that the helical buckling problem of tubing in constant-curvature wells is analyzed as a quasi-static loading problem.The initial buckling critical load of the quasi-static loading model is in agreement with the result of the linear eigenvalue problem of drill-tubing sinusoidal buckling. |
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| Keywords: | engineering mechanics numerical verification finite element method drill tubing constant-curvature wells nonlinear helical buckling |
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