Optimal Design And Experimental Research On Non-uniformly Ribbed Pressure Shell Of Underwater Glider

As a new ocean observation platform,underwater glider can provide new technical means and technical guarantee for marine scientific research and marine development in our country.The endurance ability of underwater glider,as its main technical index,is the focus of our attention in the process of research and development.In order to increase the endurance ability of the underwater glider,it can be optimized from the following two aspects.First,increase the energy carried by the underwater glider itself;second,reduce the energy consumption of the underwater glider.In this paper,through the optimal design of the pressure shell of the underwater glider,on the premise of satisfying the strength and stability of the shell,the mass of the shell is reduced as much as possible,so as to increase the energy that can be carried while keeping its total mass unchanged.At the same time,it can also reduce its energy consumption to a certain extent,and achieve the purpose of increasing its endurance capacity.This paper takes the pressure shell of "Petrel-L" long-range underwater glider developed by Tianjin University as the research object,takes the lightweight design as the goal,increases its endurance ability as the ultimate goal,and optimizes its pressure shell on the premise of ensuring the strength and stability of the shell.First of all,through the analysis of the radial deformation of the prototype shell,and combined with the high-pressure working scene of the underwater glider,a structural form of non-uniform bow ribs is proposed to add non-uniform bow ribs to the shell,which provides a reference for the design of the pressure shell of a small underwater unmanned vehicle.Secondly,after determining the structural scheme of the pressure shell,this paper first carries on the sensitivity analysis of the shell parameters,determines its key optimization variables,and then adopts the multi-objective optimization method and the second generation non-dominant sorting genetic algorithm.Taking the minimum mass as the core optimization objective,the non-uniform ribbed shell of underwater glider is optimized.Finally,the strength and stability of the pressure shell are checked by ANSYS Workbench software,and the trial-produced pressure shell is tested experimentally.Experiments on two key factors(temperature and pressure)that affect the compression amount of the shell are designed to study their effects on the compression of the pressure shell.