| Variation of Added Mass and Its Application to the Calculation of Amplitude Response for A Circular Cylinder |
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| 作者姓名： | 王艺 陈伟民 林缅 |
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| 作者单位： | Institute of Mechanics Chinese Academy of Sciences，Institute of Mechanics，Chinese Academy of Sciences，Institute of Mechanics，Chinese Academy of Sciences，Beijing 100080，China，Beijing 100080，China，Beijing 100080，China |
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| 摘 要： | In the present study,analyzed are the variation of added mass for a circular cylinder in the lock-in(synchronization) range of vortex-induced vibration(VIV) and the relationship between added mass and natural frequency.A theoretical minimum value of the added mass coefficient for a circular cylinder at lock-in is given.Developed are semi-empirical formulas for the added mass of a circular cylinder at lock-in as a function of flow speed and mass ratio.A comparison between experiments and numerical simulations shows that the semi-empirical formulas describing the variation of the added mass for a circular cylinder at lock-in are better than the ideal added mass.In addition,computation models such as the wake oscillator model using the present formulas can predict the amplitude response of a circular cylinder at lock-in more accurately than those using the ideal added mass.
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| 关 键 词： | 涡流 自然频率 水力学 圆柱体 |
| 修稿时间： | 2006-08-03 |
Variation of Added Mass and Its Application to the Calculation of Amplitude Response for A Circular Cylinder |
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| WANG Yi,CHEN Wei-min,LIN Mian.Variation of Added Mass and Its Application to the Calculation of Amplitude Response for A Circular Cylinder[J].China Ocean Engineering,2007,21(3):429-437. |
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| Authors: | WANG Yi CHEN Wei-min LIN Mian |
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| Institution: | Institute of Mechanics, Chinese Academy of Sciences, Belting 100080, China |
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| Abstract: | In the present study,analyzed are the variation of added mass for a circular cylinder in the lock-in(synchronization) range of vortex-induced vibration(VIV) and the relationship between added mass and natural frequency.A theoretical minimum value of the added mass coefficient for a circular cylinder at lock-in is given.Developed are semi-empirical formulas for the added mass of a circular cylinder at lock-in as a function of flow speed and mass ratio.A comparison between experiments and numerical simulations shows that the semi-empirical formulas describing the variation of the added mass for a circular cylinder at lock-in are better than the ideal added mass.In addition,computation models such as the wake oscillator model using the present formulas can predict the amplitude response of a circular cylinder at lock-in more accurately than those using the ideal added mass. |
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| Keywords: | vortex-induced vibration added mass lock-in mass ratio natural frequency |
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