| 水中悬浮隧道锚索在剪切流中的涡激响应 |
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| 引用本文： | 葛斐,惠磊,洪友士.水中悬浮隧道锚索在剪切流中的涡激响应[J].中国科学院研究生院学报,2007,24(3):351-356. |
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| 作者姓名： | 葛斐 惠磊 洪友士 |
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| 作者单位： | 中国科学院力学研究所非线性力学国家重点实验室,北京,100080 |
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| 摘 要： | 以Iwan改进的尾流振子模型为基础，给出了剪切流中水中悬浮隧道锚索横向涡激振动的工程分析方法，分析了悬浮隧道重浮比以及剪切流特性对锚索涡激响应的影响。计算结果表明，悬浮隧道重浮比的改变，使锚索各阶模态的频锁区域分布发生变化，从而改变了结构的涡激振动响应；剪切流陡度参数的增大会使锚索涡激响应的幅值减小，若使用均匀流场代替剪切流场计算悬浮隧道锚索的涡激振动，会过高估计其响应幅值。
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| 关 键 词： | 水中悬浮隧道 涡激响应 尾流振子模型 锚索 阿基米德桥 |
| 文章编号： | 1002-1175(2007)03-0351-06 |
| 修稿时间： | 2006年7月26日 |
Vortex-induced vibration of submerged floating tunnel tethers in shear current |
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| GE Fei,HUI Lei,HONG You-Shi.Vortex-induced vibration of submerged floating tunnel tethers in shear current[J].Journal of the Graduate School of the Chinese Academy of Sciences,2007,24(3):351-356. |
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| Authors: | GE Fei HUI Lei HONG You-Shi |
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| Institution: | State Key Lab. of Nonlinear Mechanics, Institute of Mechanics, CAS, Beijing, 100080, China |
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| Abstract: | The engineering analysis method for vortex-induced transverse vibration of submerged floating tunnel(SFT) tether is presented,based on the modified wake oscillator model.The effects of specific gravity ratio and the shear current's characteristics on the vortex-induced vibration of tether are investigated. The calculated results show that the distribution of lock-in regions and the vortex-induced vibration of tether vary with the specific gravity ratios of SFT.The increase of the shear parameter makes the amplitude of vortex-induced vibration decrease.Furthermore,if the shear current is replaced by the uniform current to calculate the vortex-induced vibration of tether,its response amplitude may be overestimated. |
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| Keywords: | submerged floating tunnel vortex-induced vibration wake oscillator model tether Archimedes bridge |
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