[Objectives]Emergency surfacing is an important aspect of submarine vitality which is closely related to submarine safety. In order to master the motion laws of submarine during emergency surfacing performance,[Methods]this paper establishes a structure model of submarine with non-watertight zone and drain-holes in the superstructure,solves the RANS equation to obtain the hydrodynamic force through discretizing the fluid field with an overset grid method,and combines solid motion equations to obtain the sub...