基于输油系统的海上漂浮软管静力学特性研究

Study on the Static Characteristics of Offshore Floating Hose Based on Integral Oil Transmission System

海上漂浮输油软管是目前海上油田进行外输作业的重要设备,对海上漂浮输油软管进行受力分析对海上软管的安全运行具有重要作用。建立了1个软管组与浮筒相连接的整体静态力学模型。考虑管组中首管和主管的影响,在重力和浮力载荷的作用下,推导获得了漂浮管组垂向形态及所受弯矩分布函数关系。研究结果表明:作用在管组上的载荷是关于自重、外径以及海水密度的函数;漂浮管组在静态载荷作用下,最大弯矩发生在浮筒和首管接口法兰处,且最大值为52.4 k N·m,最大弯曲主要取决于软管抗弯刚度、管组与浮筒管汇接口的倾斜角;首管相对于主管在竖直平面内发生较大位移,首管的最大位移为1.2 m。计算结果为软管组几何构型的设计提供了一定的理论依据,为其动态性能分析奠定了基础。

Offshore floating oil hose is an important equipment for offshore oilfield operation. The analysis of offshore floating oil hoses has an important role in the safe operation of offshore floating hoses. The integral static mechanical model of a hose group connected with the floating tank has been established. Considering the influence of the first hose and the main hose in the hose group,and under the action of gravity and buoyancy load,the relation function of the vertical form of the floating hose group and the distribution of the bending moment has been deduced. The results show that the load acting on the hose group is a function of the weight,outer diameter and sea water density. The maximum bending moment of the floating hose group occurs at the interface flange of the floating tank and the first hose,with the maximum value of 52. 4 k N·m. The maximum bending depends mainly on the bending stiffness of the hose,the inclination angle of the hose group and the floating tank manifold. The first hose has a large displacement in the vertical plane relative to the main hose,with the maximum displacement of 1. 2 m.The calculation results provide a theoretical basis for the design of the geometry of the hose group,which lays the foundation for its dynamic performance analysis.