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| A non-linear analysis method for vortex-induced vibration of deepwater risers with large deflection |
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WU Xuemin1,2, TENG Wengang3, WANG Hui3
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(1.Shandong Key Laboratory of Ocean Engineering, Ocean University of China, Qingdao 266100, China;2.Architectural and Civil Engineering Institute, Qingdao Agricultural University, Qingdao 266109, China;3.CNPC East China Design Institute Company Limited, Qingdao 266000, China)
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| Abstract: |
| A new non-linear analysis method was proposed in this work to predict the vortex-induced vibration(VIV) response of deepwater riser, in which large deformation of risers was considered, and accordingly a program for the solution of the model was designed. In this paper, the VIV response of deepwater top tensioned riser operated in a water depth of 1500 m was investigated as a case study. The new method can be used to predict the VIV characters of deepwater risers, and the results indicate that the effect of the heave of a floating platform in VIV response of deepwater risers is strongly dependent on the environmental load, riser parameters, the amplitude and frequency of the heave. |
| Key words: deepwater risers large deflection parameter excited vibration vortex-induced vibration geometric nonlinearity dynamic analysis |
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