| 输电塔钢管构件涡激振动数值模拟 |
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| 引用本文： | 邓洪洲,赵张峰.输电塔钢管构件涡激振动数值模拟[J].同济大学学报(自然科学版),2017,45(1):9-15. |
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| 作者姓名： | 邓洪洲 赵张峰 |
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| 作者单位： | 同济大学 土木工程学院，上海 200092,同济大学 土木工程学院，上海 200092 |
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| 基金项目： | 国家自然科学基金项目（51578421） |
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| 摘 要： | 用数值模拟方法对钢管构件涡激振动现象进行研究,分别进行了静止圆管绕流数值模拟以及弹簧支撑单自由度圆管绕流数值模拟.结果表明:静止圆管计算工况雷诺数介于20 000~35 000之间,升力系数幅值以及阻力系数均值的平均值分别为1.427和1.273,与前人试验结果较为吻合;涡街形成的决定性因素是物体后部两个分离剪切层的相互作用;发生涡激振动时,顺风向响应要远小于横风向响应;基于单自由度模型进行动网格分析,给出了最大位移比公式以及线性插值关系式,将二维数值模拟应用于三维钢管构件的涡振疲劳分析.
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| 关 键 词： | 钢管构件 涡激振动 圆管绕流数值模拟 涡振疲劳 |
| 收稿时间： | 2016/4/19 0:00:00 |
| 修稿时间： | 2016/11/4 0:00:00 |
Numerical Simulation of Vortex Induced Vibration of Steel Tubular Members in Transmission Tower |
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| DENG Hongzhou and ZHAO Zhangfeng.Numerical Simulation of Vortex Induced Vibration of Steel Tubular Members in Transmission Tower[J].Journal of Tongji University(Natural Science),2017,45(1):9-15. |
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| Authors: | DENG Hongzhou and ZHAO Zhangfeng |
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| Institution: | College of Civil Engineering, Tongji University, Shanghai 200092, China and College of Civil Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | A numerical simulation of still circular tube and dynamic single degree of freedom (SDOF) circular tube was performed to study the vortex induced vibration (VIV). The results show that in still case between the Reynolds number of 20k to 35k, the mean value of lift and drag coefficient amplitude are 1.472 and 1.273, respectively, which are in consistent with previous experimental investigations. The formation of vortex street is determined by the interference of the shear layers. The along wind response is far less than across wind response during VIV. Based on the feasible SDOF model with dynamic mesh and relevant formulas, the 2D simulation is applied to fatigue analysis of 3D steel tubular members. |
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| Keywords: | steel tubular members vortex induced vibration numerical simulation of flow around a circular tube vortex induced vibration fatigue |
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