Study on Multimode Vortex-Induced Vibration of Deepwater Riser in Different Flow Fields by Finite Element Simulations

Author:

Chen Weimin1,Li Min2,Zhang Liwu3,Tan Tiancai4

Affiliation:

1. Key Laboratory of Mechanics in Fluid Solid Coupling System, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China e-mail:

2. School of Aeronautics Sciences and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China e-mail:

3. Key Laboratory of Mechanics in Fluid Solid Coupling System, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China

4. School of Aeronautics Sciences and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

Abstract

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.

Publisher

ASME International

Subject

Mechanical Engineering,Ocean Engineering

Reference20 articles.

1. A Critical Review of the Intrinsic Nature of Vortex-Induced Vibration;J. Fluids Struct. Mech.,2004

2. Dimensionless Parameters Important to the Prediction of Vortex-Induced Vibration of Long, Flexible Cylinders in Ocean Currents;J. Fluids Struct.,1993

3. Moe, G., and Arntsen, O., 2001, “VIV Analysis of Risers by Complex Modes,” 11th International Offshore and Polar Engineering Conference, Vol. 3, pp. 426–430.

4. A Prediction Technique for Vortex Induced Transverse Response of Marine Risers and Tethers;J. Sound Vib.,1986

5. Vortex-Induced Traveling Waves Along a Cable;Eur. J. Mech. B/Fluids,2004

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