圆柱结构涡激振动拖曳水池实验研究

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摘要柔性圆柱涡激振动特性已得到人们广泛关注，然而横流向与顺流向振动耦合问题仍有待进一步研究。本文设计了柔性圆柱涡激振动拖曳水池模型实验，圆柱模型的长径比为195.5、质量比为1.82，实验观测了圆柱结构横流向、顺流向涡激振动特性，并分析了横流向与顺流向两个方向涡激振动的耦合现象。通过应变传感器测量结构振动信息，利用模态分析法对实验数据进行处理，实验发现横流向与顺流向涡激振动耦合现象显著，特别是不同测点处的运动轨迹出现了“8字形”、倒置的“泪滴形”、 “口唇形”等多种复杂形式。

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	高喜峰
	周丽丹
	徐万海
	马烨璇
	吴梦宁

关键词 ：涡激振动, 水池实验, 柔性圆柱, 流-固耦合

Abstract：Till now, a large number studies on vortex-induced vibrations (VIV) of flexible cylinders have been performed, but the in line (IL)-cross flow (CF) coupled VIV still needs to study further. Here, a towing tank test of VIVs of a circular cylinder was designed. The aspect ratio (length/diameter) of the cylinder model was 195.5 and its mass ratio was 1.82. With this cylinder model, the coupling effect between IL and CF VIVs was analyzed. The structural vibration was measured by means of strain gages and the modal analysis method was used to analyze the test data. It was shown that the coupling phenomenon between IL-VIV and CF-VIV is very obvious; the trajectories of different measured points have many complex forms, such as, “8-shape”, “inverted tear drop” and “mouth-shape”.

Key words： vortex-induced vibration towing tank test flexible cylinder fluid-structure interaction;

收稿日期: 2016-03-21 出版日期: 2017-11-28

引用本文:

高喜峰，周丽丹，徐万海，马烨璇，吴梦宁. 圆柱结构涡激振动拖曳水池实验研究[J]. 振动与冲击, 2017, 36(23): 131-136.
GAO Xi-feng, ZHOU Li-dan, XU Wan-hai, MA Ye-xuan, WU Meng-ning . Towing tank tests for vortex-induced vibrations of a circular cylinder . JOURNAL OF VIBRATION AND SHOCK, 2017, 36(23): 131-136.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2017/V36/I23/131

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