ACOUSTIC SCATTERING FROM AN ELASTIC SPHERICAL SHELL IN AN OCEANIC WAVEGUIDE WITH A PENETRABLE BOTTOM

作者：Grigorieva Natalie S^*; Fridman Gregory M

来源：Journal of Computational Acoustics, 2013, 21(3): 1350009.

DOI：10.1142/S0218396X13500094

• Air-filled elastic spherical shell
• shallow-water waveguide
• normal modes
• critical frequency of a normal mode

The paper describes the theory and implementation issues of modeling of the acoustic field scattered by an air-filled spherical elastic shell immersed in a shallow-water waveguide over a homogeneous, fluid half-space. The normal mode evaluation is applied to the source contribution and to the scattering coefficients. The arising branch cut integrals are simplified and expressed via the probability integral. Two cases are analyzed: when a source frequency differs from the critical frequency of a normal mode and when they coincide. The formalism is applied to evaluate the effect of coupling between propagation and scattering on transmission loss.

• 出版日期2013-9