Study On Acoustic Concealment Of Underwater Vehicle Considering The Influence Of Marine Environment

With the constant changes of the world geopolitical pattern,China’s maritime rights and interests are threatened,and it is in urgent need of strong military strength to rely on.Underwater vehicles and submarines,as important naval equipment,have attracted more and more attention.Their acoustic concealment in different Marine environments is an important guarantee for their survivability.Based on the analysis of the influence of different Marine environment factors on sound propagation,this paper focuses on the influence of different Marine environment on the acoustic concealment of underwater vehicle,so as to provide information support and reference for underwater vehicle concealment mission planning.First of all,affecting the concealment of the underwater vehicle sound,summarizes the main Marine environmental factors analysis,analyzed is closely related to the concealment of the underwater vehicle sound,sound absorption,sea water of sound velocity profile,submarine topography and bottom sediment and mesoscale vortex,ocean front of 6 kinds of elements,the characteristics of sound for the study of underwater vehicle concealment basis to provide information.Secondly,some problems related to sound propagation model are studied.Through in-depth analysis of the advantages and disadvantages of common acoustic propagation models and their applicable ranges,the parabolic model RAM and the ray model Bell Hop were selected to calculate the sound field at low frequency and high frequency,respectively,so as to provide a sound field calculation method for related acoustic obscurity experiments.In order to improve the computational efficiency,the ray model was improved by parallelization,and a queue was designed to save the sound Angle and assign it to each thread for calculation.Compared with the basic ray model and the common parallelization methods,this method can meet the requirements in terms of calculation accuracy and rapidity.Thirdly,the acoustic concealment of underwater vehicle under the influence of different Marine environment is analyzed theoretically.Firstly,the definition of acoustic concealment of underwater vehicle is given,and the effects of acoustic propagation loss,converging area,acoustic shadow area and surface waveguide on the acoustic concealment of underwater vehicle are summarized and analyzed with examples,which provides a basis for judging the acoustic concealment of underwater vehicle under the influence of Marine environment.On this basis,the acoustic concealment of underwater vehicles in shallow sea,deep sea,mesoscale vortex,ocean front and other Marine environments is analyzed and studied,and the acoustic concealment of underwater vehicles in different Marine environments is obtained.Finally,the software design and development of underwater vehicle acoustic concealment analysis and acoustic concealment experiment are completed.Firstly,the architecture,information flow and human-computer interaction interface of the acoustic concealment analysis software for underwater vehicle are designed,and the functions of environmental data processing,acoustic field numerical calculation and feature information display are realized.On this basis,combined with the actual Marine hydrological environment data,the acoustic concealment of the underwater vehicle under the influence of shallow sea and deep sea,mesoscale eddy and ocean front is analyzed through experiments,and the theoretical analysis conclusions are verified and supplemented.The conclusions have certain guiding significance for the mission planning of underwater vehicle concealment.