| Two-dimensional Vortex-induced Vibrations of Submerged Floating Tunnel Tethers | |
Ge F(葛斐) ; Long X(龙旭); Wang L(王雷); Hong YS(洪友士)
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| Source Publication | The 5th Symposium on Strait Crossings.Trondheim, Norway.June 21-24, 2009. |
| 2009-12-29 | |
| Conference Name | The 5th Symposium on Strait Crossings |
| Conference Date | June 21-24, 2009 |
| Conference Place | Trondheim, Norway |
| Abstract | A vortex-induced vibration (VIV) model is presented for predicting the nonlinear dynamic response of submerged floating tunnel (SFT) tethers which are subjected to wave, current and tunnel oscillatory displacements at their upper end in horizontal and vertical directions. A nonlinear fluid force formula is introduced in this model, and the effect of the nonlinearity of tether is investigated. First, the tunnel is stationary and the tether vibrates due to the vortices shedding. The calculated results show that the cross-flow amplitude of VIV decreases compared with the linear model. However the in-line amplitude of VIV increases. Next, the periodical oscillation of tunnel is considered. The oscillation caused by wave forces plays the roles of parametric exciter and forcing exciter to the VIV of tether. The time history of displacement of the tether mid-span is obtained by the proposed model. It is shown that the in-line amplitude increases obviously and the corresponding frequency is changed. The cross-flow amplitude exhibits a periodic behavior. |
| Indexed By | 其他 |
| Language | 中文 |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/33007 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Ge F(葛斐) |
| Recommended Citation GB/T 7714 | Ge F,Long X,Wang L,et al. Two-dimensional Vortex-induced Vibrations of Submerged Floating Tunnel Tethers[C]The 5th Symposium on Strait Crossings.Trondheim, Norway.June 21-24, 2009.,2009. |
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