The Research On Underwater Vehicle Radiation Noise Measurement Method

Underwater vehicles as an important power to defend the rights and interests of territorial waters,it has been playing an irreplaceable role in our country.In recent years with the development of science and technology,the noise of underwater vehicle is greatly reduced,as we know,the size of the underwater vehicle radiated noise is an important indicator of the equipment stealth performance,so it is very important to make accurate measurements of the underwater vehicle radiated noise,this not only can measure the combat performance of underwater vehicles,but also for the improvement of the design of more advanced equipment has important reference value,however,now we know very little about the environmental factors such as waveguide environment bring the influence on the measurement results,and even know little about use different methods to measure the same target,for the sake of figuring out this issue,the topic of this paper is the underwater vehicle radiation noise measurement research.Studying respectively the single sound pressure hydrophone,sound pressure hydrophone array and single vector hydrophone these three measuring methods,and the mainly studied is the influence of waveguide environment on the measurement of radiated noise of underwater vehicle.This paper introduces the principle of three kinds of measurement methods,Studying respectively the single sound pressure hydrophone,sound pressure hydrophone array and single vector hydrophone these three measuring methods,and the influence of waveguide environment on the measurement results is analyzed in detail.Based on the ray acoustics theory,combined with matlab and the bellhop model of two-dimensional waveguide simulation environment,and used the virtual source method for three dimensional waveguide simulation environment.Analog sound signal in sound pressure and the vector field,and analyze the underwater vehicle radiation noise characteristics,used respectively point model and volume source model to simulate underwater vehicle.To solve the volume source model of the equivalent source,using the near-field acoustical holography measurement technology and the thought of equivalent source.Based on the simulation of submarine comsol software,designed planar array,combined the theory of conformal transformation,get the equivalent source of the volume source.Simulated the underwater vehicle radiation noise signal simulation,combined with the above several kinds of measurement method and the model of the sound source.Research under the environment of different waveguide underwater vehicle radiation noise measurement results,and carries on the analysis,processed the external field experimental data,and compared its measurement results with sound source radiation signal standard value results in this article to verify the influence of waveguide environment on the measurement results of sound source radiation signal.