Design And Dynamics Of Self-sustaining Profile Buoys Of Ocean 4000m

Deep sea autonomous-profile buoy(DSAPB)is a kind of ocean observation equipment driven by buoyancy.As an important ocean observation carrier platform,it has important scientific significance for the prediction of future weather and global warming trend.It has the advantages of small size,strong endurance and low cost.Its stable operation period is generally 2-3 years.However,the marine environment is very bad.In order to prolong the service life and reduce the failure rate of the deep-sea selfsupporting profile buoy,it is necessary to ensure that the buoy structure design has good scientific and hydrodynamic performance.In order to improve the stability and extend the normal working time of the self-supporting profile buoy in the deep sea,this paper studies the design and dynamic performance analysis of the deep sea autonomousprofile buoy as follows:Firstly,from the mechanical structure of the design analysis.The design of the system is based on the principle of overall layout first and then local layout.On the basis of rigorous calculation and analysis of design parameters,the modules that meet the functional requirements are designed step by step.Finally,the modules are integrated to realize the design and function of the deep-sea profile buoy system.According to the relevant design theory of mooring buoy,the stability and natural frequency of the buoy are checked and calculated.Secondly,the CFD(Computational Fluid Dynamics)method is used to analyze and optimize the deep-sea autonomous-profile buoy.The characteristics of the flow field around the buoy are analyzed in detail,and the relationship between the resistance and the velocity of the buoy is given,which provides a theoretical basis for further optimization of the buoy.Finally,the dynamic model of the self-supporting profile buoy is established,and the hydrodynamic parameters of the self-supporting profile buoy are obtained by CFD method,and the mathematical model of the self-supporting profile buoy is obtained by introducing the buoyancy change caused by the change of seawater density into the dynamic model.which provides a theoretical basis for the depth control of the selfsupporting profile buoy.