Dynamic Analysis of a Floating Offshore Wind Turbine Under Extreme Environmental Conditions
Author:
Utsunomiya Tomoaki1, Yoshida Shigeo2, Ookubo Hiroshi3, Sato Iku4, Ishida Shigesuke5
Affiliation:
1. Department of Civil and Earth
Resources Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8540, Japan e-mail: 2. Hitachi, Ltd. Power Systems Company, Shirogane-cho 1-1-1, Hitachi, Ibaraki 317-0056, Japan 3. Nippon Steel & Sumikin Engineering Co., Ltd., Shintomi 20-1, Futtsu, Chiba 293-0011, Japan 4. Toda Corporation, Kyobashi 1-7-1, Chuo-ku, Tokyo 104-8388, Japan 5. National Maritime Research Institute, Shinkawa 6-38-1, Mitaka, Tokyo 181-0004, Japan
Abstract
This paper is concerned with the development of a floating offshore wind turbine (FOWT) utilizing spar-type floating foundation. In order to design such a structure, it is essential to evaluate the dynamic response under extreme environmental conditions. In this study; therefore, a dynamic analysis tool has been developed. The dynamic analysis tool consists of a multibody dynamics solver (MSC.Adams), aerodynamic force evaluation library (NREL/AeroDyn), hydrodynamic force evaluation library (in-house program named SparDyn), and mooring force evaluation library (in-house program named Moorsys). In this paper, some details of the developed dynamic analysis tool are given. In order to validate the program, comparison with the experimental results, where the wind, current, and wave are applied simultaneously, has been made. In this paper, only parked conditions are considered. The comparison shows that the principal behavior of the floating offshore wind turbine with spar platform has been captured by the developed program. However, when vortex-induced motion (VIM) occurs, the current loads and cross-flow responses (sway and roll) are underestimated by the simulation since the simulation code does not account for the effect of VIM.
Publisher
ASME International
Subject
Mechanical Engineering,Ocean Engineering
Reference16 articles.
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