大倾角附螺旋列板倾斜圆柱涡激振动抑制分析

徐万海; 栾英森; 余杨; 覃雯琪

doi:10.6052/j.issn.1000-4750.2016.09.0719

大倾角附螺旋列板倾斜圆柱涡激振动抑制分析

天津大学水利工程仿真与安全国家重点实验室, 天津 300072

基金项目: 国家自然科学基金项目（51479135，51579175，51679167）；国家重点基础研究计划-973计划项目（2014CB046801）

详细信息

作者简介:
栾英森(1992-),男,河北邢台人,硕士生,主要从事振动控制研究(E-mail:luanyingsen@tju.edu.cn);余杨(1988-),男,天津市人,讲师,博士,主要从事船舶海洋工程结构物设计制造研究(E-mail:yang.yu@tju.edu.cn);覃雯琪(1995-),女,广西河池宜州人,硕士生,主要从事流激振动研究(E-mail:qinwenqi@tju.edu.cn).

通讯作者:
徐万海(1981-),男,黑龙江齐齐哈尔人,副教授,博士,硕导,主要从事流激振动与振动控制研究(E-mail:xuwanhai@tju.edu.cn).

中图分类号: TV312l;O328
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出版历程
- 收稿日期: 2016-09-18
- 修回日期: 2017-07-20
- 刊出日期: 2018-01-24

VORTEX-INDUCED VIBRATION SUPPRESSION FOR AN INCLINED FLEXIBLE STRAKED CYLINDER AT LARGE INCLINATION ANGLE

State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China

摘要

摘要: 在室内拖曳水池中开展大长径比（L/D=350），小质量比（m^*=1.90）和大倾角（a=45 °）倾斜柔性圆柱涡激振动（VIV）抑制实验，观测螺旋列板对柔性圆柱VIV的抑制效果，并分析倾斜抑制圆柱涡激振动响应特性。选取海洋工程领域最优螺距/高度比组合（17.5D/0.25D）。通过拖车拖动模拟均匀来流，拖车速度范围为0.05 m/s~1.0 m/s，间隔为0.05 m/s，对应的雷诺数约为Re=800~16000。采用应变传感器测量结构横流向与顺流向的振动信息，并根据模态法处理实验数据。实验结果表明：螺旋列板对大倾角倾斜柔性圆柱VIV响应幅值和结构应变抑制效果不理想；同时观测到倾斜抑制圆柱涡激振动存在多模态的振动特征；并发现不相关原则（IP）不适用于倾斜抑制圆柱的涡激振动。
- 倾斜圆柱 /
- 螺旋列板 /
- 涡激振动 /
- 不相关原则 /
- 倾角
Abstract: A series of tests on vortex-induced vibration (VIV) suppression for an inclined flexible straked cylinder with a high aspect ratio (L/D=350), low mass ratio (m^*=1.90) and large inclination angle (a=45 °), were conducted in a towing tank. The effect of helical strakes with a pitch of 17.5D and a height of 0.25D on the VIV reduction of an inclined cylinder was investigated and discussed. The dynamic response features of an inclined straked cylinder undergoing VIV were studied. The uniform flow was generated by towing the cylinder model in still water along the tank from 0.05 m/s to 1.0 m/s with an interval of 0.05 m/s, the corresponding Reynolds number ranged from 800 to 16000. The strain signals in cross-flow (CF) and in-line (IL) directions were measured using strain gauges. The response displacement was obtained by a modal analysis approach. The experimental results indicated that the strain and displacement suppression efficiency of the inclined cylinder attached with helical strakes are not as well as that of a vertical straked cylinder. Moreover, the inclined flexible cylinder fitted with helical strakes exhibits regular CF and IL multi-modal VIV. The independence principle (IP) seems to be an unreasonable hypothesis for predicting VIV of an inclined flexible straked cylinder with large inclination angle.
- inclined cylinder /
- helical strakes /
- vortex-induced vibration /
- independence principle /
- inclination angle

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参考文献(33)

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大倾角附螺旋列板倾斜圆柱涡激振动抑制分析

通讯作者: 徐万海(1981-),男,黑龙江齐齐哈尔人,副教授,博士,硕导,主要从事流激振动与振动控制研究(E-mail:xuwanhai@tju.edu.cn).

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VORTEX-INDUCED VIBRATION SUPPRESSION FOR AN INCLINED FLEXIBLE STRAKED CYLINDER AT LARGE INCLINATION ANGLE

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通讯作者:
徐万海(1981-),男,黑龙江齐齐哈尔人,副教授,博士,硕导,主要从事流激振动与振动控制研究(E-mail:xuwanhai@tju.edu.cn).