Simulation Of The Uuv’s Movement Pose Under High Thrust

The exploration potentiality of marine resources in the South China Sea is enormous.As the main technical tool for exploring the ocean,unmanned underwater vehicles will inevitably play an important role in the exploitation of marine resources in the South China Sea.In this paper,the 6-DOF model of FLUENT is used to study the movement pose changes of the UUV during navigation.Moreover,this paper provides a reference for the strength optimization of the exterior structure,the mass distribution of the internal structure,and the attitude control.The main content is as follows:(1)This paper summarizes the development status of UUVs and the research status of the UUV.According to Newton’s laws of kinematics,a 6-DOF kinematical model is established.Furthermore,the governing equations,the basic theory of the dynamic mesh method and the macros and functions used in this paper are introduced.(2)Based on the 6-DOF model in the FLUENT,the motion process of the UUV under high thrust is simulated.The drag coefficient and lift coefficient of the UUV are calculated.In addition,the motion parameters and the dynamic parameters of the UUV,the UUV’s surface pressure and surrounding flow field of the UUV during the process are analyzed,which provides a basis for the strength optimization of the exterior structure.(3)The influence of the space between the UUV’s barycenter and buoyant center on the movement pose is studied.This paper analyzes the changes of the UUV’s motion parameters and dynamic parameters under different vertical distances and longitudinal distances between the barycenter and buoyant center.The effect of the vertical and longitudinal spacing between the UUV’s barycenter and buoyant center on its movement pose is summarized,which provides a reference for the optimization of the internal mass distribution and the design of the attitude control system.(4)Comparing the simulation results of the UUV’s motion process under different depths,the changing regularity of the motion parameters and dynamic parameters of the UUV with depth is obtained.Studying on the steering performance of the UUV’s empennage,the changing regularity of the UUV’s dynamic parameters and movement pose with different horizontal and vertical empennage angles is obtained.