Affiliation:
1. School of Engineering, Computing and Mathematics, University of Plymouth 2 , Drake Circus, Plymouth PL4 8AA, United Kingdom
Abstract
Many marine structures are composed of vertical axisymmetric floats. In this paper, a semi-analytical model based on the linear potential flow theory and an eigenfunction expansion method is developed to study wave diffraction and radiation by an array of cylindrical structures. Each structure can be formed by three coaxial cylinders of different dimensions. Based on the semi-analytical model, a constrained matrix equation of motion is presented and solved to evaluate the performance of multiple interconnected cylindrical structures. In order to verify the accuracy of the semi-analytical model, a typical OC4-DeepCwind floating offshore wind turbine (FOWT) is selected for validation. The validated model is, then, applied to study the effect of base column submergence depth, radius, and thickness on the motion response of a semi-submersible platform. Although the results of this study are of significance for the selection of the optimum semi-submersible FOWT for specific locations (with specific prevailing wave directions), the focus of this work was placed on the semi-analytical model itself, which is efficient in modeling the interaction of the wave field and can be used in future FOWT projects.
Funder
National Key Research and Development Program of China
Natural Science Foundation of Shandong Province
National Natural Science Foundation of China
Key Technology Research and Development Program of Shandong
Taishan Scholar Foundation of Shandong Province
Shanghai Jiao Tong University for supporting part of this work through the Open Research Fund Program
Subject
Condensed Matter Physics,Fluid Flow and Transfer Processes,Mechanics of Materials,Computational Mechanics,Mechanical Engineering
Cited by
4 articles.
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