Numerical Modeling of a Spherical Buoy Moored by a Cable in Three Dimensions

作     者：ZHU Xiangqian YOO Wan-Suk 

作者机构：Computer Aided Engineering Laboratory School of Mechanical Engineering Pusan National University 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2016年第29卷第3期

页      面：588-597页

核心收录：

学科分类：08[工学] 0816[工学-测绘科学与技术] 

基　　金：Supported by Human Resources Development Program of Korea Institute of Energy Technology Evaluation and Planning(KETEP) Ministry of Trade Industry and Energy of Korea(Grant No.20134030200290) 

主　　题：numerical modeling dynamic simulation spherical buoy mooring cable dynamics of cable 

摘      要：Floating facilities have been studied based on the static analysis of mooring cables over the past decades. To analyze the floating system of a spherical buoy moored by a cable with a higher accuracy than before, the dynamics of the cables are considered in the construction of the numerical modeling. The cable modeling is established based on a new element frame through which the hydrodynamic loads are expressed efficiently. The accuracy of the cable modeling is verified with an experiment that is conducted by a catenary chain moving in a water tank. In addition, the modeling of a spherical buoy is established with respect to a spherical coordinate in three dimensions, which can suffers the gravity, the variable buoyancy and Froude-Krylov loads. Finally, the numerical modeling for the system of a spherical buoy moored by a cable is established, and a virtual simulation is proceeded with the X- and Y-directional linear waves and the X-directional current. The comparison with the commercial simulation code Proteus DS indicates that the system is accurately analyzed by the numerical modeling. The tensions within the cable, the motions of the system, and the relationship between the motions and waves are illustrated according to the defined sea state. The dynamics of the cables should be considered in analyzing the floating system of a spherical buoy moored by a cable.