Open AccessNumerical computation on the scattering sound field distribution of rigid sphere in shallow water waveguide
Author(s) -
Jihui Wang,
Guijuan Li,
Bing Jia,
Zhenshan Wang,
Rui Wang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/780/3/032058
Subject(s) - waveguide , scattering , boundary element method , helmholtz equation , acoustics , helmholtz free energy , physics , computation , sound pressure , boundary value problem , field (mathematics) , finite element method , mathematical analysis , mathematics , classical mechanics , optics , algorithm , quantum mechanics , pure mathematics , thermodynamics
Numerical computational model about the scattering fields of rigid sphere in shallow water waveguide is accomplished using boundary element method and normal mode model. A kind of modified CHIEF boundary element method is used to solve the non-uniqueness problem at characteristic frequency for exterior sound field computation. The green function for shallow water waveguide acoustic wave propagation is modified based on the normal mode model. The acoustic pressure in the far field yields Kirchhoff Helmholtz equation and the scattering sound field distribution of rigid sphere in a Pekeris waveguide is achieved. Also the scattering sound field distribution of rigid sphere in the free field is calculated. The results indicate that the waveguide influences the sound propagation, and it need to pay attention during the test.