深水漂浮式光伏平台系泊结构动力响应分析

DYNAMIC RESPONSE ANALYSIS OF MOORING STRUCTURE FOR DEEP-WATER FLOATING PHOTOVOLTAIC PLATFORM

基于实际工程深水漂浮式光伏平台特征提出系泊对称布置方案,建立光伏平台与系泊结构耦合数值计算模型,通过对比验证计算模型的准确性。根据实测海洋环境风浪流条件,开展漂浮式光伏平台系泊结构全时域动力耦合计算分析,探究0°、45°与90°方向极端海况作用下光伏平台6个自由度运动响应及系泊结构张力响应。结果表明:光伏平台6个自由度运动均在最大波高发生时刻响应最大,0°方向下纵荡运动和90°方向下横摇运动最为显著;0°、45°和90°方向下迎浪面系泊缆张力最大,背浪面系泊缆张力响应相对较小;系泊缆张力达到最大时,0°、45°和90°方向下迎浪面系泊缆呈绷紧状,其余系泊缆呈松弛悬链线状,较好反映了系泊缆张力响应。

Based on the characteristics of the deep-water floating photovoltaic platform in the practical engineering,a arrangement scheme plan is proposed,and a numerical calculation model of the photovoltaic platform and the mooring structure is established,and the accuracy of the calculation model is verified by comparison.According to the measured marine environment wind,wave,and current conditions,the full-time dynamic coupling calculation and analysis of the mooring structure for the floating photovoltaic platform are carried out to explore the motion response of the photovoltaic platform at six degrees of freedom and the tension response of the mooring structure under the extreme sea conditions in the 0°,45°,and 90°directions.The results show that the motions of the six degrees of freedom of the photovoltaic platform all respond the most when the maximum wave height occurs,and the surge motion in the 0°direction and the roll motion in the 90°direction are the most significant;in the directions of 0°,45°,and 90°,the mooring line tensions at the head sea side are the largest,and the tension responses of the mooring lines at the back swell are relatively small;when the tension responses of the mooring lines reach the maximum,the mooring lines in the direction of 0°,45°,and 90°are taut,the other mooring lines show the relaxation catenary linear,which preferably reflects the tension response of the mooring lines.