Shallow sea sound propagation calculation method applied to three-dimensional sound elasticity analysis of ship

Abstract

The invention discloses a shallow sea sound propagation calculation method applied to three-dimensional sound elasticity analysis of ships, and belongs to the field of the three-dimensional sound elasticity analysis of ships. The method comprises the steps of: establishing a finite element model of a three-dimensional structure; performing dry modal analysis on the finite element model to obtain dry modal parameters of the three-dimensional structure; obtaining a source strength of a wet surface element of the three-dimensional structure according to the dry modal parameters; calculating normal mode parameters for a frequency point according to marine environment parameters; calculating a Green function value of each wet surface element at a field point according to the normal mode parameters, position information of each wet surface element and position information of the field point; calculating a sound pressure level of the three-dimensional structure at the field point on the frequency point according to the Green function value and the source strength of the wet surface element. Thereby, the problem that the calculation amount of the sound radiation and the sound propagation of the three-dimensional structure is large and the efficiency is low is solved and the effect of reducing the amount of calculation, improving the efficiency of calculation, and improving the engineering application value of softwares is achieved.

Description

technical field [0001] Embodiments of the present invention relate to the field of three-dimensional acoustoelastic analysis of ships, and in particular to a shallow sea sound propagation calculation method applied to three-dimensional acoustoelastic analysis of ships. Background technique [0002] The acoustic radiation characteristics of underwater three-dimensional structures are not only related to the coupled vibration between the structure itself and the water medium, but also closely related to the ocean acoustic environment in which the three-dimensional structures are located. At present, the three-dimensional hydroelastic theory of ships has been combined with the underwater acoustic channel theory to establish a three-dimensional acoustic elastic theory of ships, and the corresponding three-dimensional acoustic elastic analysis software THAFTS-Acoustic for ships has been developed. [0003] THAFTS-Acoustic, a three-dimensional acoustoelastic analysis software for ...

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Problems solved by technology

[0004] However, when analyzing large-scale ship structures, it is necessary to divide the large-scale ship structure into a large number of wet surface element grids. At each frequency point, each grid needs to independently solve the corresponding Green function value, and the calculation amount is quite huge. low efficiency

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