NDLI: Coupled Dynamic Modeling of a Moored Floating Platform With Risers

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Jing, Xiaoning William, C. Webster Xu, Qi Lambrakos, Kostas
Copyright Year	2011
Abstract	A time domain coupled analysis capability has been developed to model the dynamic responses of an integrated floating system incorporating the interactions between vessel, moorings and risers in a marine environment. Hydrodynamic responses of the vessel allowing diffraction, radiation damping and wave drift forces on panelized bodies in addition to loads on Morison members, are modeled using the well-established program, MLTSIM. RodDyn, a finite element rod dynamics program, based on Garrett’s rod theory, is an efficient program to model the nonlinear dynamics of risers and moorings. The coupled MLTSIM-RodDyn suite integrates the nonlinear motions and structural analysis capabilities of RodDyn with the extensive hydrodynamic simulation capabilities of MLTSIM. With the fully-coupled dynamic analysis, the integrated system can be analyzed consistently. That is, the forces and moments applied by the rods to the platform are concurrent with the motions imposed on the rods by the platform at their multiple contact points. An asynchronous coupling of these two programs has been developed which allows for a fast simulation of this very complex problem. A worked example showing the nonlinear coupled analysis, is elaborated with systematical comparison with uncoupled analysis.
Sponsorship	Ocean, Offshore and Arctic Engineering Division
Starting Page	427
Ending Page	436
Page Count	10
File Format	PDF
ISBN	9780791844335
DOI	10.1115/OMAE2011-49553
Volume Number	Volume 1: Offshore Technology; Polar and Arctic Sciences and Technology
Conference Proceedings	ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
Language	English
Publisher Date	2011-06-19
Publisher Place	Rotterdam, The Netherlands
Access Restriction	Subscribed
Subject Keyword	Damping Dynamic response Nonlinear dynamics Integrated systems Mooring Vessels Dynamic analysis Rods Stress Pipeline risers Diffraction Simulation Radiation (physics) Dynamics (mechanics) Wave drift forces Finite element analysis Risers (casting) Dynamic modeling Structural analysis
Content Type	Text
Resource Type	Article

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