Reduced-scale model experimental device of coupling responses in deep-water j-lay operation and experimental method

A reduced-scale model experimental device of coupling responses in deep-water J-lay operation, comprising a water tank, a seabed simulation mechanism, a deep-water pipeline model, a horizontal mooring mechanism, a pipeline departure angle control mechanism and an anchor end connection mechanism;

• wherein,
• a U-shaped trailer frame is mounted above a water tank, two sliding rails are mounted on two sides of the trailer frame in parallel, and a six-degree-of-freedom motion signal receiver is mounted at one end of the trailer frame;
• and a pipe-laying ship model floats on a water surface of the water tank, and a six-degree-of-freedom motion sensor corresponding to the six-degree-of-freedom motion signal receiver is mounted on an upper surface of the pipe-laying ship model;
• the seabed simulation mechanism is located on a bottom surface of an interior of the water tank;
• the pipeline departure angle control mechanism for adjusting an included angle between a top end of the deep-water pipeline model and the pipe-laying ship model is mounted between the top end of the deep-water pipeline model and the pipe-laying ship model, and a bottom end of the deep-water pipeline model is connected with the seabed simulation mechanism through the anchor end connection mechanism;
• and the deep-water pipeline model naturally bends under a gravity, a touch-down zone of the deep-water pipeline model is laid on the seabed simulation mechanism, and a yellow fluorescent sticker for marking is mounted on a nearby part of a touch-down point;
• and
• the horizontal mooring mechanism comprises four sets of horizontal mooring assemblies;
• the four sets of horizontal mooring assemblies are respectively connected to four corners of the pipe-laying ship model;
• each set of horizontal mooring assemblies comprises a horizontal mooring line, a mooring line adjustment unit and a mooring line tension sensor;
• various mooring line adjustment units are horizontally movably mounted on corresponding sliding rails;
• and when various mooring line adjustment units move on the corresponding sliding rails, lengths and tail end positions of the horizontal mooring lines are changed, thus adjusting pre-tensions of the mooring lines and a wave-approach angle of the pipe-laying ship model in the water tank.