Multimode vortex-induced vibration (VIV) of slender risers, respectively, in stepped and shear flows is explored by finite element simulations. Taking account of the interaction between fluid and structure, a hydrodynamic model is proposed and embedded into the finite element simulation so as to carry out dynamic response of multimode VIV in time-domain. Multimode VIV in both stepped and shear flow fields is examined. In the case of stepped flow, a semi-empirical formula of modal weight is given. In the case of shear flow, modal excitation region can be determined based on modal energy, and participating modes approximately distribute in scattering groups.
Study on Multimode Vortex-Induced Vibration of Deepwater Riser in Different Flow Fields by Finite Element Simulations
Solid Coupling System,
Institute of Mechanics,
Chinese Academy of Sciences,
Beijing 100190, China
Beijing University of Aeronautics and Astronautics,
Beijing 100191, China
Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received October 12, 2011; final manuscript received September 16, 2015; published online October 29, 2015. Editor: Solomon Yim.
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Chen, W., Li, M., Zhang, L., and Tan, T. (October 29, 2015). "Study on Multimode Vortex-Induced Vibration of Deepwater Riser in Different Flow Fields by Finite Element Simulations." ASME. J. Offshore Mech. Arct. Eng. February 2016; 138(1): 011801. https://doi.org/10.1115/1.4031729
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