Journal ArticleDOI
Dynamic analysis of marine risers with vortex excitation
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TLDR
In this article, the basic equations for nonplanar transverse vibrations of marine risers are derived from the theory of elastic rods and a numerical method is developed for solution of the equations by time integration.Abstract:
The basic equations for nonplanar transverse vibrations of marine risers are derived from the theory of elastic rods. A numerical method is developed for solution of the equations by time integration. Spatial discretization is accomplished by a hybrid finite element method. Vortex excitation is modeled by the coupled wake oscillator proposed by Iwan and Blevins. The vortex oscillator equations are integrated numerically in time along with the riser equations. By way of example, several typical riser problems are analyzed including forced vibration and vortex-induced vibration.read more
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Journal ArticleDOI
Review of flexible riser modelling and analysis techniques
Minoo H. Patel,F.B. Seyed +1 more
TL;DR: An overview of the development of hydrodynamic analysis techniques for flexible risers can be found in this article, which highlights key issues addressed during these developments including the effects of internal and external hydrostatic pressures and of internal flow.
Journal ArticleDOI
Development of a Finite Element Cable Model for Use in Low-Tension Dynamics Simulation
TL;DR: In this paper, a computationally efficient and novel third-order finite element is presented that provides a representation of both the bending and torsional effects and accelerates the convergence of the model at relatively large element sizes.
Journal ArticleDOI
Large deformation three-dimensional static analysis of deep water marine risers
TL;DR: In this article, the problem of static three-dimensional, nonlinear, large deformation response of a marine riser is formulated within small strain theory and solved numerically, and a solution method is developed based on an incremental finite element algorithm, which involves a prediction-correction scheme.
Dissertation
Dynamics modelling of low-tension tethers for submerged remotely operated vehicles
TL;DR: In this article, a low-tension tether dynamics model for simulation of ROVs is presented, which includes representations of bending and torsional stiffness and are based on a lumped mass approximation to the tether continuum, an approach that has been widely applied in simulation of taut underwater cables.
Journal ArticleDOI
A prediction technique for vortex induced transverse response of marine risers and tethers
G.J. Lyons,M.H. Patel +1 more
TL;DR: In this article, a theoretical time domain analysis is presented for simulating the vortex shedding induced transverse response of long tensioned submerged flexible members which are subjected to oscillatory displacements at their upper end.
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