| 低质量-阻尼因子圆柱体的涡激振动预报模型 |
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| 引用本文： | 潘志远,崔维成,刘应中.低质量-阻尼因子圆柱体的涡激振动预报模型[J].船舶力学,2005,9(5):115-124. |
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| 作者姓名： | 潘志远 崔维成 刘应中 |
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| 作者单位： | 上海交通大学船舶海洋与建筑工程学院,上海,200030;中国船舶科学研究中心,江苏,无锡,214082 |
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| 摘 要： | 本文考查了在均匀来流中作横向振荡的圆柱体与周围流体之间的能量转移,由此建立了基于受迫振荡实验数据的弹性支撑圆柱体在均匀流中的涡激振动响应预报模型.根据此模型,分析了低质量-阻尼因子圆柱体的涡激振动响应特性.就水中圆柱体涡激振动响应特性相关的几个关键性问题进行了深入的讨论,包括响应振幅的决定因素、附加质量对锁定范围及响应频率的影响.正确理解这些问题对于深水立管涡激振动响应的有效预报至关重要.
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| 关 键 词： | 涡激振动 响应预报模型 锁定 响应频率 锁定区间 |
| 文章编号： | 1007-7294(2005)05-0115-09 |
| 收稿时间： | 2005-06-06 |
| 修稿时间： | 2005年6月6日 |
A predicting model for self-excited VIV of a circular cylinder at low mass-damping |
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| PAN Zhi-yuan,CUI Wei-cheng,LIU Ying-zhong.A predicting model for self-excited VIV of a circular cylinder at low mass-damping[J].Journal of Ship Mechanics,2005,9(5):115-124. |
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| Authors: | PAN Zhi-yuan CUI Wei-cheng LIU Ying-zhong |
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| Abstract: | Examining the energy transfer in free and forced vibration tests,a model based on the data from forced vibration experiments is developed for predicting the vortex-induced vibrations(VIV) of elastically mounted circular cylinders in flow.The response characteristics of cylinders at low mass-damping are analyzed by the propose model.Several key issues concerning the VIV behaviours of cylinder in water are discussed intensively,including under what conditions does the classically employed mass-damping parameter can be applied to predict the maximum peak amplitude,how and to what degree does the added mass effect influence the extent of lock-in regime and corresponding excitation frequency.These discussions give insight to VIV characteristics of marine riser and are helpful to build the predicting model for VIV of riser in deep water. |
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| Keywords: | vortex-induced vibration(VIV) response prediction model lock-in excitation frequency lock-in regime |
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