海床冲刷对海上风电海缆及弯曲限制器的影响研究

该文以海上风电领域常用的海缆及弯曲限制器系统为研究对象,从系统所受荷载、结构特征、响应与失效特征出发,定性分析海床冲刷对系统结构响应的影响。同时借助海洋工程动力分析软件Orcaflex,建立数值分析模型并进行定量分析,以冲刷坑几何尺度、海缆松驰程度、J形管末端角度与喇叭口同海床相对高程等几何参数为变量,探讨海缆及弯曲限制器的拉伸和弯曲响应变化规律。结果表明上述参数显著影响海缆及弯曲限制器对海底冲刷的适应能力,相关研究结果可为海上风电海缆工程设计和运维管理提供参考。

INFLUENCE OF SCOUR ON SUBSEA CABLES AND BEND RESTRICTORS OF OFFSHORE WIND FARM

This paper qualitatively analyzes the effects of the changes on the system configuration due to the seabed scour. A numerical analysis model is established with Orcaflex, for quantitatively study and obtaining the change rules of the structural responses of a subsea cable and bend restrictor system, along with the development of seabed scour. Furthermore, the applicability to seabed scour for different configurations of cable and bend restrictor system, is explored by changing some key configuration parameters, including the redundancy length of subseacable, the angle of J-tube lower end, and the relative elevation of the bell-mouth to seabed. It is proved that the above parameters have significant impacts on the applicability to the seabed scour for subsea cable and bend restrictor systems. This paper can be used as a reference for the engineering design, operation and maintenance of subsea cables of wind farms.