Study On Receiving Capability Of The Vector Hydrophone Located On Finite-sized Baffle

With the development of vector hydrophone technology, vector hydrophone has been widely applied to almost every area of underwater acoustics. However, there are many problems when considering the effect of baffle in practice. In the thesis, a kind of 2-D cylindrical vector hydrophone was designed based on its work principle and design method for the requirement of experiment. The vector hydrophone with the sizeφ40×64mm was made up of pressure channels and vector channels, and work between 1kHz～10kHz. Its receiving capability was measured in anechoic lab. The result of experimentation indicated: The pressure sensitivity of vector channels was -183dB (measure frequency: 1000Hz, 0dB re 1V/μPa) with direction performance of cosine, and the pressure sensitivity of pressure channels was -196dB (0dB re 1V/μPa).In this thesis, a method based on the use of the finite element method and the boundary element method, was used to acquire diffractive sound field of the finite-sized baffle and investigate receiving capability of vector hydrophone located on the baffle. A feasible numerical emulational method which using ANSYS and SYSNOISE was brought forward. The receiving capability of vector hydrophone influenced by some different baffles was calculated and measured, and the calculated results were consistent with the test. The investigative conclusion showed that the numerical emulational method was fit for estimating receiving capability of the vector hydrophone in the near field of a baffle, and the change of the receiving capability had consanguineous correlation with characteristic of the baffle and frequency of the sound.