Ship Maneuvering Motion And Mooring Motion Simulation Mathematical Model

With the rapid development of marine ship,study used for numerical simulation of shipmotion mathematical model of water becomes particularly important. The main purpose ofthis paper is to establish the ship manipulating and anchoring sports simulation mathematicalmodel and design the visualization software which is used for real time simulation of shipwith the6-DOF motion in the verification of this model having engineering significancefoundation.Firstly, basing on the rigid motion theory and combining with the ship’s movementcharacteristics, we will establish the6-DOF motion equations. According to the MMGseparated modeling ideas, the right force (moment) is divided into three main parts:the activeforce, whereby the propeller, rudder force, cable force; environmental interference force,namely wind, wave force; bare hull water power, including the inertial and viscoushydrodynamics.Secondly, the three part force mathematical model is established. During the modelingprocess, according to the ship ’s own characteristics,the suitable mathematical model for twinrudder is selected reasonably,the model gives full consideration to the hull and propeller,rudder three between interactions; for mooring force, this paper selects the undercover stateZhuang Si Bangzhao catenary method; in order to facilitate the numerical simulation, thewind is assumed to be constant force; for the wave force, then according to Fu Rude Krylovhypothesis, and the hull was simplified as box body, built corresponding waves interferenceforces and drift force.Then, the numerical simulation program which is based on the mathematical model will bedesigned.After that,we will simulation waves in direct motion and rotary motion of the waterand contrast the simulation result with the experimental value of the relative ratio,and validatethe simulation to know whether the system is reasonable.according to the simulation of windenvironment of various ship maneuvering motion and mooring motion, analysis study ofdifferent environment on ship motion influence characteristic is done.Finally, this paper sets up a mathematical model of the core program, after establishment ofDLL dynamic link library,we will develop and design the visualization software which is based on VB6.0software development platform for real time simulation of ship maneuveringmotion and mooring.