ACOUSTIC WAVEFRONT TRACING IN INHOMOGENEOUS, MOVING MEDIA

作者：Zabotin Nikolay A^*; Godin Oleg A; Sava Paul C; Zabotina Liudmila Y

来源：Journal of Computational Acoustics, 2012, 20(3): 1250009.

DOI：10.1142/S0218396X12500099

• Wavefronts
• timefronts
• wavefronts tracing
• moving media
• irregular media
• geometrical acoustics
• underwater acoustics

We extend the Huygens wavefront tracing algorithm, which is a part of an open source Madagascar project, to sound propagation in inhomogeneous, moving media and apply it to a series of benchmark tasks. One set of tasks admits exact analytic solutions and serves the purpose of validation of the new algorithm. Another set of calculations demonstrates applicability of the algorithm to the studies of wavefront dynamics and stability in ocean and atmospheric acoustics. The method is based on a system of differential equations equivalent to the eikonal equation, but formulated in the ray coordinate system. In this paper, we present a first-order, two-dimensional discretization scheme that is interpreted very simply in terms of the Huygens%26apos; principle. The method has proved to be a convenient alternative to conventional ray tracing.

• 出版日期2012-9