Graduate Thesis Or Dissertation
 

Hydroelastic modeling of a wave energy converter using the arbitrary Lagrangian-Eulerian finite element method in LS-DYNA

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/2n49t393s

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  • This thesis investigates the applicability of the finite element method to model wave energy converter (WEC) hydroelasticity using LS-DYNA. The proposed methodology uses the Arbitrary Lagrangian-Eulerian formulation to model Fluid-Structure Interaction (FSI) between the WEC and the fluid elements. This formulation allows for time-domain modeling of higher order effects such as fluid vorticity and viscosity, and nonlinear / breaking waves. This document presents initial investigations into: (i) the suitability of the current FSI simulation capability in LS-DYNA for modeling WECs, (ii) and fluid-structure coupling methodology, (iii) the development of an improved computational wave basin, and (iv) realistic mooring and power take-off modeling. This project is the first stage of an ongoing effort to advance the state of the art in numerical modeling of WECs and other offshore structures using the finite element methodology. For modeling efforts continuing in the future, a framework for the eventual validation of numerical results using experimental data from testing of Columbia Power Technologies 1:33 and 1:7 scale SeaRay WEC is also presented.
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