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Hydrodynamics of the wind float OC3-Hywind with mooring loads estimated by the modular system

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Abstract

In this research, a modular system is preliminarily developed to estimate motion responses of wind floats with the quasi-static mooring loads in waves. The modular system consists of the hydrodynamic simulator and the BEM (Boundary Element Method) solver based on the 3D source-distribution method. Specifically, the hydrodynamic simulator can be divided into three modules, including body element module, constraint module and global reference frame module, respectively. Subsequently, an indicator, Response Amplitude Operator (RAO), is suggested to present the resonance frequencies of wind floats for determining stability and safety in the operational sea state. In addition, it can be used to realize the contribution of the mooring load to the six Degree-of-Freedom (6 DOF) motions at the resonance frequency, and be considered as the design concept of mooring lines. In case of the mooring load, our model results are reasonably in agreement with other published data of numerical simulations. Eventually, a modular system developed by the software, Simulink, would be compared to the present hydrodynamic models for verifying its capability.

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Acknowledgements

The authors would like to express their thanks to the Ministry of Science and Technology for a Grant under Contract No. MOST 106-2221-E-006-114. The authors also thank the great support for this work provided by International Wave Dynamics Research Center (IWDRC), National Cheng Kung University, for a Grant under Contract No. MOST 106-2911-I-006-301. The research was, in part, supported by the Ministry of Education, Taiwan, R.O.C. The aim for the Top University Project to the National Cheng Kung University.

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Authors and Affiliations

  1. Department of Systems and Naval Mechatronic Eng., National Cheng Kung University, Tainan, 70101, Taiwan

    Yu-Hsien Lin, Chao-Li Hsu & Shin-Hung Kao

  2. International Wave Dynamics Research Center, National Cheng Kung University, Tainan, 70101, Taiwan

    Yu-Hsien Lin

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  1. Yu-Hsien Lin
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  2. Chao-Li Hsu
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Correspondence to Yu-Hsien Lin.

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Lin, YH., Hsu, CL. & Kao, SH. Hydrodynamics of the wind float OC3-Hywind with mooring loads estimated by the modular system. J Mar Sci Technol 24, 237–248 (2019). https://doi.org/10.1007/s00773-018-0549-z

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  • DOI: https://doi.org/10.1007/s00773-018-0549-z

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