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Modeling the Underwater Acoustic Field Excited by an Airborne Rapidly Moving Source Using Wavenumber Integration

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3 Author(s)
Yipeng Zhang ; College of Oceanic Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi Province, P. R. China, 710072. Email: ; Yuanliang Ma ; Kunde Yang

It is complicated to model the acoustic field in stratified ocean for airborne aircraft, due to high speed of the source and acoustic transmission across the air-water interface. The wavenumber integration representation given by Schmidt and Kuperman can be used to model the temporal received signal for a moving source in stratified media. However, it requires intensive computation for calculating two-dimensional integrals at each time sampling point. In this paper, a faster calculation method is presented, and the computation cost for the integrals can be reduced obviously. The acoustic fields in both shallow water and deep-sea environments were computed using this method with rapidly moving airborne source. When the source moves through a static receiver, an approximation of one-dimensional wave-number integration can be obtained by stationary phase method

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Date of Conference:

18-21 Sept. 2006