Sensitivity Analysis of Hybrid Split-Step Fourier/Finite Difference Parabolic Equation Models
| Autor: | Geoffrey R. Moss, Kevin B. Smith, Mustafa Aslan |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Surface (mathematics)
Physics Acoustics and Ultrasonics Pressure release Applied Mathematics Mathematical analysis Finite difference Boundary (topology) 01 natural sciences Computer Science Applications 03 medical and health sciences symbols.namesake 0302 clinical medicine Fourier transform 0103 physical sciences Acoustic propagation symbols Sensitivity (control systems) 030223 otorhinolaryngology 010301 acoustics Physics::Atmospheric and Oceanic Physics |
| Zdroj: | Journal of Theoretical and Computational Acoustics. 26:1850006 |
| ISSN: | 2591-7811 2591-7285 |
| DOI: | 10.1142/s2591728518500068 |
| Popis: | Traditionally, ocean acoustic propagation models assume the sea surface can be treated as an idealized pressure release boundary. For flat surfaces, this can easily be accomplished through a variety of modeling techniques. Rough surfaces, however, introduce additional complexities in numerical models which assume a pressure release condition. An alternative approach is to model the physical water/air interface in a manner analogous to the water/sediment interface of the bottom. However, the ocean surface boundary introduces a much larger interface discontinuity than the bottom interface. In this work, a previously developed hybrid split-step Fourier/finite-difference approach is implemented at the water/air interface. Results are compared with standard SSF smoothing approaches. Normal mode and finite element models are utilized to provide benchmark solutions. Tradeoffs between accuracy and stability are discussed, as well as the model’s ability to accurately compute transmission across the water/air interface. |
| Databáze: | OpenAIRE |
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