Research On Shape Design Optimization Of Long-voyage Underwater Glider

The underwater glider is a new type of underwater vehicle,which has the characteristics of small weight,long range,high concealment,etc.It has received extensive attention from the international community in recent years.In order to observe ocean phenomena with wider time and space scales,researchers have put forward higher requirements on the control performance,sailing time and mileage of underwater gliders.The shape of the underwater glider is the key factor that determines the water resistance and sports performance.To this end,this paper takes the Petrel-L long-voyage underwater glider as the application object to carry out the research on the optimal design of the shape of the underwater glider.The relevant research and conclusions are summarized as follows:First,the vertical and horizontal steady-state linear gliding and horizontal plane slewing motion equations of the underwater glider are derived,and the obtained dynamic equations are simplified in the horizontal and vertical planes to obtain the voyage,stability,maneuverability,drag coefficient,and lift coefficient.The mathematical relationship between and torque coefficient.It provides a basis for the long-range underwater glider shape optimization.Secondly,for the main body optimization problem,the hull design is optimized based on the CFD(Computational Fluid Dynamic)simulation method.The Myring line type is selected as the body shape of the underwater glider.Furthermore,based on the results of water resistance analysis,the length-diameter ratio parameters of the body are optimized to determine the basic size of the body.Thirdly,the multi-disciplinary collaborative optimization method is adopted to divide the appendage of the long-range underwater glider into two subsystems: wing and tail.The single-profile voyage is the system-level optimization goal,the maximum lift-drag ratio is the wing subsystem optimization goal,and the best maneuverability is the tail wing subsystem optimization goal,forming an appendage optimization plan.Finally,the optimized Latin hypercube experimental design method is used to carry out the experimental design of the appendage size parameters;the i SIGHT software is integrated with CATIA,ICEM,Fluent,and MATLAB to build an automatic calculation platform,and the experimental design sample points are simulated and analyzed based on the simulation results Construct an approximate optimal model of the second-order response surface of the appendage.Optimized the size parameter of the long-range underwater glider attachment.