The Overall Design And Hydrodynamic Analysis Of Aquatic AUV Recovery System

With the wide application of AUV,the corresponding recovery and carrying technology has also been developed from recovery by surface platforms to autonomous underwater recovery way.The recovery method is increasingly flexible and concealed.Based on the selected recovery way,carrying by the submarine and guided by the ROV,this paper aims to make some general design and some research in the hydrodynamics relative to aquatic AUV recovery and carrying by submarine.The research contents include:(1)Firstly,on the basis of analyzing the working conditions and application requirements of the aquatic AUV recovery system,the functional modules of the system are divided,the comparative analysis and design demonstration of multiple schemes are carried out.According to the advantages and disadvantages and practicability of each scheme,the best scheme is selected,and the three-dimensional solid model of the recovery system is established by using modeling software.(2)Then,based on block grid and dynamic layering technology,CFD numerical simulation method was used to model and analyze the hydrodynamic interference of AUV relative to different positions of the submarine for recovery,so as to select the optimal location and recovery velocity for AUV.According to the selected location,the stress of the AUV model with different attached body characteristics during the extreme carrying movement with the submarine was further analyzed.(3)Finally,considering that the AUV was weakly affected by the flow field around the submarine in the early stage of recovery,the hydrodynamic interference rules of the two UUV models at different speeds and pitch angles were obtained by simulation for the optimal carrying position.Meanwhile,the results were fitted,and the accuracy of the fitting results relative to the numerical calculation results was randomly verified.The research work in this paper provides a detailed design reference for the independent research and development of the aquatic AUV recovery system,and also provides a certain theoretical basis and data reference for the hydrodynamic characteristics of AUV in the process of recovery and carrying.