Research On Multi-objective Optimal Design Of Three-body Combined Autonomous Underwater Vehicle Based On Parameterization

This paper aims at the problems of low design efficiency,poor effect,and inaccurate acquisition of optimal solutions due to the many parameters in the design of underwater vehicles with complex structures.Using CFD numerical calculation method,agent model technology and multi-objective genetic algorithm and other technical means,with comprehensive consideration of the design requirements of the underwater vehicle,such as the speed,stability,endurance and economy,an optimized design study of a three-body combined autonomous underwater vehicle proposed by the author was carried out.The optimized design model of the underwater vehicle is based on the optimized design method of this paper,and the design of the three-body combined autonomous underwater vehicle designed in this paper is optimized.The optimization design method and research results in this paper can provide reference and reference for the shape design of underwater vehicles with multiple shape parameters.The main research contents and results of this paper are as follows:First,under the constraints of project requirements,construction conditions,economy,etc.,this paper proposes a three-body combined autonomous underwater vehicle and completes the parametric overall design work of this underwater vehicle.The overall design work mainly includes five parts: shape design,primary selection of propulsion device,power energy selection,general layout design and economic analysis.On the basis of the overall design work,the CFD numerical calculation method and norm calculation are used to determine the objective function,impact factor and impact factor feasible region of the four modules of this design optimization,and build a three-body combined autonomous underwater vehicle integrated system model.Then select the random Latin hypercube experiment design method and ellipse-based neural network agent model technology,based on Isight software integrated CFD numerical calculation software Star CCM +,experiment design and agent model construction components,construct the agent model,and get the response value.Specifically,based on the test factor combination matrix obtained from the test design,the 3D modeling software is used to realize parametric modeling,integrated CFD numerical analysis software and agent model module,to build resistance,propeller thrust,propeller torque,float body volume,main cabin Agent models such as body shell volume,floating body drainage volume,main cabin drainage volume,etc.Finally,on the basis of the integrated system model of the three-body combined autonomous underwater vehicle,the objective function and constraints of the optimized design of the underwater vehicle in this paper are finally determined,and the optimized design model of the three-body combined autonomous underwater vehicle.Using the established agent model instead of the CFD numerical calculation,the sample values needed for the optimal solution in this chapter are obtained.Based on Isight,the optimized design framework of the underwater vehicle in this paper is built.The multi-objective genetic algorithm is preferably used to solve the objective functions such as drag,propeller efficiency,high stability,endurance time,economy,etc.,and the Parito optimal solution set is obtained.Based on factors such as project requirements,design specifications,construction difficulty,and process requirements,a variety of optimized design solutions are provided.