| 海底管道受坠物撞击的三维仿真研究 |
| |
| 引用本文： | 杨秀娟,修宗祥,闫相祯,冯永训.海底管道受坠物撞击的三维仿真研究[J].振动与冲击,2009(11). |
| |
| 作者姓名： | 杨秀娟 修宗祥 闫相祯 冯永训 |
| |
| 作者单位： | 杨秀娟,修宗祥,闫相祯(中国石油大学,华东,储运与建筑工程学院,山东,东营,257061);冯永训(胜利工程设计咨询公司,山东,东营,257061) |
| |
| 摘 要： | 采用三维非线性有限元法模拟海底管道受到船锚或其他坠落物体的冲击碰撞过程,并采用Newmark法和N-R迭代法相结合求解了撞击动力学方程,分析了物体形状、碰撞角度、物体与管道间摩擦、混凝土厚度及管道内压对管道碰撞的影响.结果表明相同撞击条件下,立方体和球体对管道的撞击产生的最大Mises应力要比圆锥体大的多,随着圆锥角角度的增加管道的最大Mises应力是增加的;碰撞角度为90°时对管道的影响最大;摩擦对管道撞击影响较小;管道最大Mises应力随着混凝土层厚度的增加而减小,但随混凝土厚度的增加,减小的幅度越来越小;内压的存在使管道等效应力增加,但能减小管壁上的局部变形,使得冲击能量更多被用来产生整体变形.
|
| 关 键 词： | 海底管道 撞击 非线性有限元 动力响应 罚函数 |
3D simulation of submarine pipeline impacted by dropped objects |
| |
| Abstract: | Three-dimensional nonlinear finite element method was used to simulate the process on the submarine pipeline impacted by anchor or other dropped objects. The dynamic response of submarine pipeline was analysed by using Newmark method and N-R iterative method during impact. The effects of object shape, impact angle, friction, concrete thickness and internal pressure on pipeline were discussed. The results show that the cubical and spherical objects will produce larger maximum Mises stress in pipeline than the conical, and the maximum stress has a proportional relationship with the conical angle. The Mises stress in pipeline reaches maximum at the impact angle of 90 degree; the friction is of little influence on the impact. The Mises stress in pipeline decreases as the concrete thickness increases and the decreased degree is becoming smaller as the thickness of concrete increases; internal pressure makes the Mises stress in pipeline bigger, but reduces the local deformation of pipeline, while more global deformation is achieved. |
| |
| Keywords: | submarine pipeline impact nonlinear finite element dynamic response penalty functions |
| 本文献已被 万方数据 等数据库收录！ |
|
