Research And Implementation Of Underwater Sound Field Simulation Technology Based On Ocean Database

With the increasing maturity of numerical simulation technology,military information technology is also emerging rapidly.The role of simulation technology in the military is also increasing,but then it also brings the difficulties of missing marine environmental data,low resolution and how to combine marine environmental data to assess sonar detection capability.Based on this,this paper researches and establishes the underwater sound field calculation model and sonar detection model,combines the influence factors of hydroacoustic propagation using ocean numerical simulation technology to simulate the data of the ocean environment,and constructs a marine database with comprehensive and high resolution data combined with observation data to provide accurate data support for sound field calculation and sonar performance prediction and improve the reliability of prediction results;combines the ocean-acoustic-detection is combined,and underwater sound field simulation software based on the ocean database is designed and implemented to serve as the basic support for simulating combat simulation.The main work of this paper is as follows.(1)To study the environmental factors of hydroacoustic propagation,the algorithm principle of numerical simulation technology is investigated for the problems of current data,and the temperature,salt and current data are simulated with high resolution by using ROMS model,and the data results are verified by comparing simulation and observation data,and the results show that the resolution of ROMS data is higher than that of observation data;the marine environment database is established by combining Argo data and GEBCO data to provide high-quality data support for hydroacoustic simulation and sonar detection performance research.(2)Research on the hydroacoustic channel model,the algorithm of the high-frequency beam ray model,the use of Bellhop model for sound field calculation,by building a specific scene for simulation experimental analysis,the results show that the sound field calculation model has a better expression of the hydroacoustic propagation path and loss,can provide accurate propagation loss data for sonar performance prediction.(3)Study the parameter factors affecting the sonar detection performance,use each parameter to study the sonar equation,and combine the quality factor and signal margin to establish the sonar detection capability model,through the construction of specific scenarios for simulation experimental analysis,the results show that the sonar detection capability model can clearly express the sonar detection distance and detection performance,providing theoretical support for the implementation of underwater sound field simulation software.(4)The above studies are fused and applied using Qt framework to design and implement the underwater sound field simulation software based on marine database.The software adopts a layered architecture with presentation layer,business layer and data layer,and the unique mechanism of Qt’s signal and slot is used to communicate between different layers;the functions of marine environment display,sound field calculation and sonar detection capability prediction are realized,and finally the software is tested,and the results show that the software has good performance in all aspects.