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http://dx.doi.org/10.7734/COSEIK.2016.29.6.521

Numerical Analysis of Dynamic Response of Floating Offshore Wind Turbine to the Underwater Explosion using the PML Non-reflecting Technique  

Cho, Jin-Rae (Department of Naval Architecture and Ocean Engineering, Hongik University)
Jeon, Soo-Hong (School of Mechanical Engineering, Pusan National University)
Jeong, Weui-Bong (School of Mechanical Engineering, Pusan National University)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.29, no.6, 2016 , pp. 521-527 More about this Journal
Abstract
This paper is concerned with the numerical analysis of dynamic response of floating offshore wind turbine subject to underwater explosion using an effective non-reflecting technique. An infinite sea water domain was truncated into a finite domain, and the non-reflecting technique called the perfectly matched layer(PML) was applied to the boundary of truncated finite domain to absorb the inherent reflection of out-going impact wave at the boundary. The generalized transport equations that govern the inviscid compressible water flow was split into three PML equations by introducing the direction-wise absorption coefficients and state variables. The fluid-structure interaction problem that is composed of the wind turbine and the sea water flow was solved by the iterative coupled Eulerian FVM and Largangian FEM. And, the explosion-induced hydrodynamic pressure was calculated by JWL(Jones-Wilkins-Lee) equation of state. Through the numerical experiment, the hydrodynamic pressure and the structural dynamic response were investigated. It has been confirmed that the case using PML technique provides more reliable numerical results than the case without using PML technique.
Keywords
floating offshore wind turbine; underwater explosion; PML non-reflecting technique; fluid-structure interaction analysis; structural dynamic response;
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Times Cited By KSCI : 1  (Citation Analysis)
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