Study On Numerical Simulation Method Of Floating Ice Breaking Of Large Submarine Considering Ship-ice-water Coupling

At present,with the continuous development of polar resources,its value is becoming increasingly prominent.In order to ensure the successful completion of the tasks of resource development,scientific research and exploration in the polar ice area,it is necessary to study the problems existing in the navigation of submersible in the polar ice area,among which the floating and ice breaking of submersible in the polar ice area is particularly important.For the submarine navigating in the polar region,the current research work mainly focuses on the collision between the hull structure and underwater objects,while there is relatively little research on the floating and ice breaking of the submarine.Based on SPH-FEM numerical calculation method,a numerical model considering boat ice water coupling is established in this paper.On this basis,the ice load and motion characteristics of submarine in the process of floating and breaking ice are studied.The main work of this paper includes the following parts:(1)The SPH theory and the coupling algorithm with FEM are studied,and the numerical method considering the ship ice water coupling is established.By comparing with the actual ice breaking process of the model submarine,the accuracy of the sea ice material model and the ship ice water coupling floating ice breaking model are verified;(2)The numerical models of submarine floating ice breaking considering ship ice water coupling and ship ice interaction are established respectively.By comparing the ice load calculation results obtained by the two models,the influence of water medium on the simulated hull ice breaking load is analyzed.(3)Based on the numerical calculation method of submarine floating ice breaking considering the ship ice water coupling,the numerical simulation of submarine floating ice breaking under various typical working conditions is carried out.The total ice breaking force,typical ice breaking force and the motion characteristics of the hull in the ice breaking process are systematically studied,and the influence laws of sea ice thickness,floating ice breaking speed and other factors on the ice breaking force and motion characteristics of the submarine are obtained.