A Disk Type Underwater Glider Pressure Hull Parametric Design And Optimization

The round disk type underwater glider is a new type of underwater glider,which has excellent maneuverability and maneuverability.It has extensive application in military monitoring,scientific research and so on.In the case of a dish shaped underwater glider,the main role of the pneumatic hull structure is to withstand the pressure of the water,and to provide a safe working environment for researchers and equipment.It is also the main unit of the buoyancy of the hull,it is the key factor affecting the hydrodynamic performance of the hull.The weight of the traditional underwater glider's pressure hull accounts for 1/4-1/2 of the whole pressure shell.Therefore,the lightweight optimization of the pressure hull can effectively reduce the weight of the underwater glider.In this paper,the research on the pressure hull of the underwater glider is studied:First of all,according to the working conditions and the mechanical characteristics of the glider,a reasonable mechanical model is established.The parametric modeling of the dish shaped pressure hull is modeled by the ANSYS parametric command language APDL,and the user interface is customized.This method can greatly reduce the workload and improve the efficiency of analysis.Secondly,the optimal design of the circular dish underwater pressure hull is carried out by using the ANSYS optimization module.Taking the quality as the goal,the single objective optimization design of the pressure hull structure is carried out by using the zero order optimization and the first order optimization method.After optimization,the quality was reduced by 29.4%,and the effect of light weight was obvious.Again,using the ANSYS WORKBENCH module,the structure of quality and stress as the objective function,using the design method of Latin hypercube sampling of the design variables,the structure optimization of the glider to create Kriging model by using the sample data,using NSGA-II multi-objective optimization algorithm to optimize the structure of multi objective design of the glider.The results show that the performance of the glider has been greatly improved.Then,using the ISIGHT ANSYS integration for the integrated optimization design of the pressure shell of a dish shaped underwater,with quality as the single objective optimization design build MIGA and Hooke-jeeves combination,the multi-objective optimization process,and the quality of stress as the target at the same time,a multi-objective optimization algorithm using NCGA and Hooke-jeeves combination.Taking into account the multi-objective optimization is more suitable for the performance of the pressure hull,to achieve a lightweight shell.the paper designs the scheme of the lightweight design of the underwater dish,which is the most suitable for the design of the underwater pressure hull,which is the optimal design of the NSGA-?.In the end,Considering the difference between different software and the uncertainty of design variables,the radial basis function neural network approximation model is established in the integrated software ISIGHT,and the 6 Sigma robust optimization design of the circular plate underwater pressure hull is carried out.The optimized structure is more robust and reliable.