Research On Maneuverability And Motion Simulation Of A Long-Endurance Underwater Vehicle

In recent years people have paid more and more attention to the ocean, on account of its huge economic potential and high political status. Among all of the ocean techniques, an underwater vehicle with abilities of long endurance and deep submerged distance becomes the key point of our researches. The object we studied in this thesis is a long-endurance submersible vehicle which can work in a wide-range sea area and deal with complex tasks.Maneuverability is an important part of the vehicle's general abilities. A vehicle with excellent maneuverability will navigate safely and perform well in the war. The motion simulation system is a tool to forecast it.In this thesis the six-degree freedom of motion equations were built and the forces needed to solve the equations were analyzed firstly. Secondly, hydrodynamic coefficients of the vehicle were calculated by three kinds of method following: approximate formula method, surface panel method and CFD software numerical simulation. All the calculated data were compared with experimental data. The applicability and precision of each method were given meanwhile hydrodynamic coefficients that needed in motion equations were presented. Finally, the motion simulation platform was built and the motion performance of the vehicle was analyzed. Simulation courves of typical movements were presented and the maneuverability of the underwater vehicle was also analyzed.