Research On Ship-ship Interactions Between Two Ships

The study of ship-ship interaction when multiple ships are sailing at close range is a classic subject in ship fluid mechanics.When the ship is sailing at sea or the platform is operating in the open sea,the materials consumed must be replenished quickly,so maritime replenishment has to be adopted.When the lateral replenishment method is used,the intership interference between the two ships will cause the hull to sway,resulting in the crew’s work efficiency being affected,and in serious cases,it will lead to safety accidents,so the study of inter-ship interference is very important.In this project,DTMB5512 is selected as the receiving ship,KCS is the supply ship,CFD method is used,and overset mesh technology is used to study the ship-ship interaction:(1)Firstly,the DTMB5512 and KCS are simulated in single water sailing in parallel and two ships in parallel,and the simulation results of the single ship are used as the reference value,and the results of the simulation of the two ships are compared to analyze the hull movement,stress,The effect of hull surface pressure and wave height near the hull;(2)Then,the two ships with different speeds and spacings were simulated in parallel,and the effects of the speed and lateral spacing on the ship-ship interaction between ships were analyzed.(3)The subject also studied the chasing and tracking problems of the two ships,and simulated the DTMB5512 chasing and KCS and KCS chasing and DTMB5512,respectively,and analyzed the influence of the continuous change of the longitudinal distance between the two ships on the ship-ship interaction.Through the study of this paper,the following conclusions are drawn: when the two ships are parallel,the ship-ship interaction destroys the symmetry of the traveling waves,the shipship interaction causes the pressure on the corresponding points on the left and right sides of the hull of the two ships to be unequal,and the hull is subjected to lateral forces.The direction of the lateral force points to each other,the two ships attract each other,and both ships have a roll.The roll angle of the big ship is smaller than that of the small ship;the greater the speed when the two ships are parallel or the smaller the lateral separation,the the ship-ship interaction between the ships stronger.In the process of the boat chasing the big ship,the shipship interaction received by the big ship gradually becomes larger after the longitudinal distance becomes smaller,and becomes more violent after the small ship surpasses the big ship;during the forward movement of the ship,this disturbance becomes more and more gradual Increase and start to become smaller after surpassing the big ship.In the process of the big ship chasing the small ship,after the supply ship reaches a position close to the longitudinal distance of the receiving ship,the ship-ship interaction of the supply ship for the receiving ship becomes more obvious,and the influence of the ship-ship interaction on the supply ship is always relatively small.