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剪切流中立管的涡激振动响应预报

ISSN号：1001-4500
期刊名称：中国海洋平台
时间：0
页码：21-25
分类：P751[交通运输工程—港口、海岸及近海工程;天文地球—海洋科学]
作者机构：[1]School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410004, China, [2]Hunan Province Key Laboratory of Water, Sediment Sciences & Flood Hazard Prevention, Changsha University of Science & Technology, Changsha 410004, China, [3]State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China, [4]Offshore Pipelines & Risers (OPR) Inc., Hangzhou 310000, China
相关基金：Foundation item： the Science Fund for Creative Research Groups of the National Natural Science Foundation of China （No. 50921001）, the National Natural Science Foundation of China （No. 41176072）, the Scientific Research Fund of Hunan Provincial Education Department （No. 12C0030）, and the Open Research Fund Program for Hunan Province Key Laboratory of Water, Sediment Sciences ＆ Flood Hazard Prevention （No. 2012SS07）
相关项目：海洋环境灾害作用与结构安全防护

关键词：海洋学, 调查, 观测, 深海工程, vortex-induced vibration （VIV）, pipeline span, force identification, pipe near plane boundary

中文摘要：

<正>Formally,use of system identification techniques to estimate the forces acting on the beam may give information on hydrodynamic forces due to vortex-induced vibrations(VIVs),but no results from such attempts for submarine pipeline spans have been reported.In this study,a pipe model with a mass ratio(mass/displaced mass) of 2.62 is tested in a current tank.The gap ratios(gap to pipe diameter ratio) at the pipe ends are 2.0,4.0, 6.0 and 8.0.The response of the model is measured using optical fiber strain gauges.A modal approach linked to a finite element method is used to estimate the hydrodynamic forces from measurement.The hydrodynamic force at the dominant response frequency is the major concern,and the lift force and added mass coefficients are calculated.Response calculations are performed using force coefficients from the inverse force analysis and the calculated results are in accordance with the experimental data.

英文摘要：

Formally, use of system identification techniques to estimate the forces acting on the beam may give information on hydrodynamic forces due to vortex-induced vibrations （VIVs）, but no results from such attempts for submarine pipeline spans have been reported. In this study, a pipe model with a mass ratio （mass/displaced mass） of 2.62 is tested in a current tank. The gap ratios （gap to pipe diameter ratio） at the pipe ends are 2.0, 4.0, 6.0 and 8.0. The response of the model is measured using optical fiber strain gauges. A modal approach linked to a finite element method is used to estimate the hydrodynamic forces from measurement. The hydrodynamic force at the dominant response frequency is the major concern, and the lift force and added mass coefficients are calculated. Response calculations are performed using force coefficients from the inverse force analysis and the calculated results are in accordance with the experimental data.

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