正弦振荡来流下柔性立管涡激振动发展过程

王俊高; 付世晓; 许玉旺; 宋磊建

doi:10.6052/0459-1879-13-277

正弦振荡来流下柔性立管涡激振动发展过程

doi: 10.6052/0459-1879-13-277

上海交通大学海洋工程国家重点实验室, 上海 200240

基金项目: 国家自然科学基金资助项目（51279101，51009088）.

详细信息

作者简介:
付世晓，研究员，主要研究方向：立管涡激振动.E-mail：shixiao.fu@sjtu.edu.cn

中图分类号: P756.2
计量
- 文章访问数: 1945
- HTML全文浏览量: 78
- PDF下载量: 2164
- 被引次数: 0
出版历程
- 收稿日期: 2013-08-26
- 修回日期: 2013-09-18
- 刊出日期: 2014-03-18

VIV DEVELOPING PROCESS OF A FLEXIBLE CYLINDER UNDER OSCILLATORY FLOW

State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Funds: The project was supported by the National Natural Science Foundation of China (51279101, 51009088).

摘要

摘要: 在风浪流的作用下，海洋浮式结构物将带动悬链线立管在水中作周期性往复运动，从而在立管运动方向上产生相对振荡来流，这种振荡来流将激励立管悬垂段发生“间歇性” 的涡激振动. 在海洋工程水池中对一个4m 长的立管微段进行模型试验研究，以探索相对振荡来流作用下立管涡激振动产生的机理及其发展的物理过程. 试验通过振荡装置带动模型作正弦运动来模拟不同最大约化速度U_R_max、不同KC（Keulegan-Carpenternumber）的相对振荡来流，利用光纤应变片测量立管涡激振动响应. 结合模态分析方法处理试验数据得到位移响应时历，继而提出相对振荡来流下柔性立管涡激振动发展的3 个阶段：建立阶段、锁定阶段以及衰减阶段. 并进一步总结了最大约化速度U_R_max，KC 对涡激振动发展过程的影响规律. 最终获得不同最大约化速度U_R_max下，涡激振动各发展阶段随KC 所占时间分布比例图.
- 涡激振动发展过程 /
- 振荡来流 /
- 柔性立管 /
- 最大约化速度
Abstract: Offshore floating structures would bring the catenary risers moving in the water periodically under sea loads, then to generate relatively oscillatory flow between the riser and the water particles. Such oscillatory flow would easily trigger the "intermittent VIV" at sag-bend of the catenary riser. Experimental investigations on the behaviors of a 4m long straight flexible cylinder in the relatively oscillatory flow were carried out in this paper by forcing it oscillating with different combinations of both maximum reduced velocity U_R_max and Keulegan-Carpenter number (KC) in still water. Fiber brag grating (FBG) strain sensors were used to measure the VIV responses of the model cylinder. Meanwhile, modal analysis was adopted to process the experimental data, and three VIV developing process in oscillatory flow including "building-up", "locking-in" and "dying-out" were firstly proposed. Furthermore, effects on VIV in oscillatory flow from both reduced velocity U_R_max and KC were discussed and summarized. Finally, normalized time ratio contour plots of three VIV developing phases in different maximum reduced velocities were obtained.
- VIV developing process /
- oscillatory flow /
- flexible cylinder /
- maximum reduced velocity

HTML全文

参考文献(19)

Griffin OM, Vandiver JK. Vortex-induced strumming vibrations of marine cables with attached masses. Journal of Energy Resources Technology, 1984, 106: 458-485

Lie H, Kaasen KE. Modal analysis of measurements from a large-scale VIV model test of a riser in linearly sheared flow. Journal of Fluids and Structures, 2006, 22(4): 557-575

Karl HH, Kunt M. Vortex induced vibrations of a catenary riser. In: Proc. of 3rd International Symposium on Cable Dynamics, Trondheim, 1999. 103-110

Allen DW, Henning DL. Prototype vortex-induced vibration tests for production risers. In: Proc. of Offshore Technology Conference, Houston, USA, 2001. Paper OTC 13114

Tognarelli MA, Slocum ST, Frank WR, et al. VIV response of a long flexible cylinder in uniform and linearly sheared currents. In: Proc. of Offshore Technology Conference, Houston, USA, 2004. Paper OTC 16338

Wilde DE, Jaap J, Huijsmans, et al. Laboratory investigation of long riser VIV response. In: Proc. of ISOPE Conference, Toulon, 2004

Chaplin JR, Bearman PW, Huera HFJ, et al. Laboratory measurements of vortex-induced vibrations of a vertical tension riser in a stepped current. Journal of Fluids and Structures, 2005, 21: 3-24

Trim AD, Braaten H, Lie H, et al. Experimental investigation of vortex-induced vibration of long marine risers. Journal of Fluids and Structures, 2005, 21: 335-361

Vandiver JK, Marcollo H, Swithenbank S, et al. High mode number vortex-induced vibration field experiments. In: Proc. of Offshore Technology Conference, Houston, USA, 2005. Paper OTC 17383

Fu SX, Ren T, Li RP, et al. Experimental investigation on VIV of the flexible model under full scale re number. In: Proc. of 30th OMAE, Rotterdam, 2011. Paper No. OMAE2011-49042

唐国强, 吕林, 滕斌等. 大长细比柔性杆件涡激振动试验. 海洋工程, 2011, 29(1): 18-25 (Tang Guoqiang, Lü Lin, Teng Bin, et al. VIV model test for large space ratio flexible risers. Ocean Engineering, 2011, 29(1): 18-25 (in Chinese))

张永波, 郭海燕, 孟凡顺等. 基于小波变换的顶张力立管涡激振动规律试验研究. 振动与冲击, 2011, 30(2): 149-154 (Zhang Yongbo, Guo Haiyan, Meng Fanshun, et al. Experimental investigation on VIV of top-tensioned riser based on wavelet transformation. Journal of Vibration and Shock, 2011, 30(2): 149-154 (in Chinese))

Robert GG, Richard WL, Partha M. Highly compliant rigid (HCR) riser model tests and analysis. In: Proc. of Offshore Technology Conference, Huston, USA, 1999. Paper No. OTC 10973

Chang SH, Mike I. Vortex-induced vibrations of steel catenary risers and steel offloading lines due to platform heave motions. In: Proc. of Offshore Technology Conference, Huston, USA, 2003. Paper No. OTC 15106

Liao JC. Vortex-induced vibration of slender structures in unsteady flow.[PhD Thesis]. Massachusetts: Massachusetts Institute of Technology, 2002

Gonzalez EC. High Frequency dynamic response of marine risers with application to flow-induced vibration.[PhD Thesis]. Massachusetts: Massachusetts Institute of Technology, 2001

Sarpkaya T. Wave Forces on Offshore Structures. Cambridge: Cambridge University Press, 2010

Vandiver JK, Li L. SHEAR7 V4.4 Program Theoretical Manual. Massachusetts Institute of Technology, 2005

Larsen CM, Vikestad K, Rttervik R, et al. VIVANA Theory Manual. MARINTEK, 2001

施引文献

资源附件(0)

访问统计