| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Coupled Perturbed Modes over Sloping Penetrable Bottom |
| Fei-Long Zhu1,2, Eric I. Thorsos3, Feng-Hua Li1** |
1State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190
2University of Chinese Academy of Sciences, Beijing 100049
3Applied Physics Laboratory, University of Washington, WA 98105, USA |
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| Cite this article: |
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Fei-Long Zhu, Eric I. Thorsos, Feng-Hua Li 2017 Chin. Phys. Lett. 34 074302 |
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Abstract In environments with water depth variations, one-way modal solutions involve mode coupling. Higham and Tindle developed an accurate and fast approach using perturbation theory to locally determine the change in mode functions at steps. The method of Higham and Tindle is limited to low frequency ($\le$250 Hz). We extend the coupled perturbation method, thus it can be applied to higher frequencies. The approach is described and some examples are given.
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Received: 24 February 2017
Published: 23 June 2017
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| PACS: |
43.30.Bp
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(Normal mode propagation of sound in water)
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43.20.Bi
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(Mathematical theory of wave propagation)
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43.20.Mv
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(Waveguides, wave propagation in tubes and ducts)
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Abstract
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