The Research For Motion Response Analysis Of Towed Linear Array Sonar

As a kind of underwater acoustic exploration equipment,the towed linear array sonar system is used in a variety of underwater exploration operations.The towed line array sonar system targeted by this study is composed of a ship,a winch,a limit hole,a towing cable,and a linear array sonar.The linear array sonar includes a connecting frame,a connecting chain on both sides,a mounting frame and a mounting sonar.As the towed linear array sonar system is affected by factors such as the speed,cable lowering length,and ocean currents of the ship,its working attitude and the load of various components will change.In order to enable the operator to understand the real-time attitude and load of the linear array sonar,this paper models and analyses the motion response of the towed linear array sonar system.Through numerical simulation analysis,this paper focuses on the influence of key factors such as waves,ship speed,and cable lowering length on the hydrodynamic and mechanical response of the towed linear array sonar system.Numerical simulation analysis shows that as the speed of the ship increases,the tension at the top of the towing cable decreases,but the tension at the limit hole and the end of the towing cable increases,and the load of the connecting chain increases,resulting in an increase in the inclination of the towing cable and the linear array sonar.When the wave direction is 90° and 180°,the towing cable tension varies widely,and it is prone to large tension.At the limit hole,the towing cable tension is most obviously affected by the wave direction.The increase of the lowering length of the towing cable will reduce the range of the inclination angle of the connecting chain and make the linear array sonar more stable.In order to ensure the safety of the system,real-time monitoring of the motion state and force of the towed line array system is required.Therefore,based on the system monitoring information and without considering the inertial force,this paper develops a towed linear array real-time load and attitude analysis program based on the linear array sonar numerical calculation model,and compares it with the calculation results of Orca Flex,numerical comparison analysis shows: the result of the program in this paper is consistent with the calculation result of Orca Flex,and the maximum relative error between the load calculation result of the program in this paper and the calculation result of Orca Flex is under 10%,which can realize the analysis of the real-time underwater attitude and the load of key parts of the linear array sonar,and provide an important basis for the safety assessment of the system.Finally,based on the towed linear array real-time load and attitude analysis program,this paper develops the towed linear array sonar load and attitude virtual reality software,which prompts safety issues and ensure the safety of the system at work...