Dynamics modeling and simulation of UUV with cabin doors opened process

To secure the UUV load release, simulation and study on the cabin doors opened process is indispensable. The disturbing f orce characteristics of the cabin doors-opened process is num erically simulated by using sliding mesh, and the hydrodynam ic characteristicof UUV with cabin doors open is simulated b y numerical calculation of three dimensionalflow-filed, and b y building up the dynamics model of UUV in cabin doors-ope ned process,the disturbed movement characteristics of UUV i s simulated and studied under the different cabin doors-opene d angular speeds. The simulation results show that influenced by thedisturbance of the cabin doors-opened process, UUV m oves downwards in longitudinal planewith theattenuation of p itch oscillation, and the higher the doors-opened angular spee d is, the moresevere the disturbed movement is. The simulatio n results can be used as the initialconditionsof subsequent sec urity release of load.