| 系统识别法在双自由度涡激振动试验研究中应用(英文) |
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| 引用本文： | 康庄.系统识别法在双自由度涡激振动试验研究中应用(英文)[J].船舶与海洋工程学报,2009,8(2):99-104. |
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| 作者姓名： | 康庄 |
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| 作者单位： | 康庄,KANG Zhuang(哈尔滨工程大学深海工程技术研究中心,黑龙江哈尔滨,150001);William C.WEBSTER,William C.WEBSTER(美国加利福尼亚大学伯克利分校,加利福尼亚伯克利CA,94720-1710)
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| 摘 要： | 采用系统识别的方法对双自由度圆柱体的涡激振动特性进行了分析研究.试验是在美国麻省理工大学开展,在得到的圆柱体涡激振动轨迹中,由于受到试验条件的影响,如自由液面和水池池底,得到的轨迹并非对称的"8字形".因此首先对原始试验结果进行了分解,得到其傅里叶级数展开形式,然后采用了系统识别的方法对其进行分解,分别得到对称和非对称的试验结果,并认为对称的结果为理想或深海条件下圆柱体的涡激振动轨迹,而在自由液面和水池池底等其他因数的干扰下,产生了非对称的试验结果.
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| 关 键 词： | 系统识别法 双自由度 涡激振动 |
An application of system identification in the two-degree-freedom VIV experiments |
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| Zhuang Kang,William C. Webster.An application of system identification in the two-degree-freedom VIV experiments[J].Journal of Marine Science and Application,2009,8(2):99-104. |
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| Authors: | Zhuang Kang William C Webster |
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| Institution: | KANG Zhuang1 , William C. WEBSTER2 1. Deepwater Engineering Research Center,Harbin Engineering University,Harbin 150001,China 2. University of California,Berkeley CA 94720-1710,USA |
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| Abstract: | Experiments on the two-degree-freedom vortex-induced vibration (VIV) of a flexibly-mounted,rigid,smooth cylinder were performed at MIT. The research reported here is an analysis of the cylinder's trajectories. System identification methods were used to derive a best Fourier representation for these motions and to parse these motions into symmetric and asymmetric behaviors. It was postulated that the asymmetric behavior was due to distortions caused by the free surface and bottom used at the test facility,an... |
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| Keywords: | system identification two-degree-freedom vortex-induced vibration (VIV) |
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