Numerical Modeling of Nonlinear Elastic Components of Mooring Systems
Authors:
- W. PaulWPW. Paul
- B. CelikkolBCB. Celikkol
- 13 June 2005
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Oceanic Engineering
- Vol. 30 (1) , 37-46
Abstract
This paper deals with the finite-element analysis of compliant structures containing nonlinear elastic components and subjected to loading by waves and currents. An efficient procedure to model such components is developed and implemented in a computer program. It can be applied to analyze nonlinear elastic ropes, rubber tethers, risers, and hoses. The elastic modulus is assumed to depend on the amount of strain in a component. The Newton-Raphson iteration scheme is modified to account for the change of elastic properties on each step of time integration procedure. The approach is applied to develop feed buoy mooring systems for the University of New Hampshire Open Ocean Aquaculture site. The complex nonlinear and viscoelastic load-elongation behavior of suitable high stretch mooring elements for this application is modeled to obtain realistic numerical predictions at sea conditions. Various designs and environmental loading scenarios are considered. Numerical simulations provide predictions of the overall dynamics of the system and maximum values of tensions in critical components.Keywords
This publication has 14 references indexed in Scilit:
- A Case Study of a Modified Gravity Type Cage and Mooring System Using Numerical and Physical ModelsIEEE Journal of Oceanic Engineering, 2005
- Dynamic behavior of offshore spar platforms under regular sea wavesOcean Engineering, 2003
- Finite element modeling of net panels using a consistent net elementOcean Engineering, 2003
- Fish cage and mooring system dynamics using physical and numerical models with field measurementsAquacultural Engineering, 2003
- Open Ocean Aquaculture Engineering: Numerical ModelingMarine Technology Society Journal, 2000
- Dynamics of ocean cables with local low-tension regionsOcean Engineering, 1998
- On the dynamics of oceanographic surface mooringsOcean Engineering, 1996
- Modelling the response of cable elements in an ocean environmentFinite Elements in Analysis and Design, 1992
- Evaluation of force-displacement relationship for multicomponent mooring cable by F.E.M.Computers & Structures, 1988
- The Force Exerted by Surface Waves on PilesJournal of Petroleum Technology, 1950