浮式生产储油系统内孤立波载荷特性实验

Experiments on the load characteristics of the floating production storage and offloading system in internal solitary waves

将置于大尺度密度分层水槽上下层流体中的两块垂直板反方向平推,以基于MCC理论解的内孤立波诱导上下层流体中的层平均水平速度作为其运动速度,发展了一种振幅可控的双推板内孤立波实验室造波方法,并对内孤立波作用下浮式生产储油系统(FPSO)的载荷特性开展了系列实验。结果表明,无因次内孤立波水平力和力矩幅值均与先导内孤立子无因次振幅之间呈线性关系,其斜率与上下层流体深度比有关;在各种上下层流体深度比下,无因次内孤立波垂向力幅值与先导内孤立子振幅之间近似呈幂函数关系。

A laboratory wave-making method is developed for the internal solitary wave whose amplitude can be controlled by two oppositely-pushing vertical plates placed separately in the upper and lower layer fluids in a large-scale density stratified tank. Based on the MCC theoretical solution, the layer-mean velocities of the upper and lower layer fluids induced by the internal solitary wave are used as the velocities of the two plates. A series of experiments on the load characteristics of floating production storage and offloading system （FPSO） in internal solitary waves are conducted. The results show that the amplitudes of dimensionless horizontal force and moment linearly increase with the dimensionless amplitude of the leading internal solitary wave, and the gradients are related to the depth ratio of the upper and lower layer fluids; while the dimensionless vertical force is approximately in power function relation to the dimensionless amplitude of the leading internal solitary wave under various depth ratios of the upper and lower layer fluids.