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A High-Efficiency Spectral Method for Two-Dimensional Ocean Acoustic Propagation Calculations

Guardado en:
Udgivet i:Entropy vol. 23, no. 9 (2021), p. 1227
Hovedforfatter: Ma, Xian
Andre forfattere: Liu, Wei, Xiao, Wenbin, Lan, Qiang
Udgivet:
MDPI AG
Fag:
Accuracy
Propagation
Acoustic propagation
Sound fields
Sound propagation
Partial differential equations
Helmholtz equations
Optimization
Collocation methods
Chebyshev approximation
Boundary conditions
Methods
Polynomials
Underwater acoustics
Acoustics
Galerkin method
Two dimensional models
Spectral methods
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Resumen:The accuracy and efficiency of sound field calculations highly concern issues of hydroacoustics. Recently, one-dimensional spectral methods have shown high-precision characteristics when solving the sound field but can solve only simplified models of underwater acoustic propagation, thus their application range is small. Therefore, it is necessary to directly calculate the two-dimensional Helmholtz equation of ocean acoustic propagation. Here, we use the Chebyshev–Galerkin and Chebyshev collocation methods to solve the two-dimensional Helmholtz model equation. Then, the Chebyshev collocation method is used to model ocean acoustic propagation because, unlike the Galerkin method, the collocation method does not need stringent boundary conditions. Compared with the mature Kraken program, the Chebyshev collocation method exhibits a higher numerical accuracy. However, the shortcoming of the collocation method is that the computational efficiency cannot satisfy the requirements of real-time applications due to the large number of calculations. Then, we implemented the parallel code of the collocation method, which could effectively improve calculation effectiveness.
ISSN:1099-4300
DOI:10.3390/e23091227
Fuente:Engineering Database