| 低雷诺数下圆柱涡激振动的二维有限元数值模拟 |
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| 引用本文： | 赵刘群,陈兵.低雷诺数下圆柱涡激振动的二维有限元数值模拟[J].海洋技术,2006,25(4):117-121. |
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| 作者姓名： | 赵刘群 陈兵 |
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| 作者单位： | 大连理工大学土木水利学院港海教研室,辽宁,大连,116024 |
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| 摘 要： | 采用有限元方法求解原始变量的二维不可压粘性流体的N-S方程,计算了雷诺数从90到150范围内圆柱绕流引起的涡激振动,完整地再现了流固耦合系统从不共振到频率锁定,再到脱离锁定的过程,成功地预测到了涡激振动的“拍”和“锁定”现象,并与A nagnostopou los和B earam an的试验结果进行了比较。计算涡激振动时用ALE方法分析圆柱和流体的耦合作用,圆柱振动被简化为质量-弹簧-阻尼系统。
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| 关 键 词： | 圆柱 涡激振动 ALE 有限元 |
| 文章编号： | 1003-2029（2006）04-0117-05 |
| 收稿时间： | 2006-06-02 |
| 修稿时间： | 2006年6月2日 |
Two-dimensional FEM model of Vortex-Induced Vibration of a Circular Cylinder |
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| ZHAO Liu-qun,CHEN Bing.Two-dimensional FEM model of Vortex-Induced Vibration of a Circular Cylinder[J].Ocean Technology,2006,25(4):117-121. |
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| Authors: | ZHAO Liu-qun CHEN Bing |
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| Institution: | School of Civil and Hydraul, Eng, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | The finite element method was employed to solve the N-S equation.Incorporated with the vibration equation,the vortex-induced vibration of the circular cylinder is studied by an Arbitrary-Lagrangian-Eulerian(ALE) algorithm.The Reynolds number based on the cylinder diameter and the undisturbed flow velocity range from 90 to 150.The motion of the cylinder was modeled by a spring-damper-mass system.The numerical model has been validated by comparison with the experimental data in literature.The "lock-in" and"beating" phenomena were successfully reproduced in the numerical test. |
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| Keywords: | Circular cylinder Vortex-induced vibration ALE FEM |
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