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Research on the acoustic scattering function and coherence properties from rough seafloor based on finite element model |
| Bo Lei(雷波), Yi-Xin Yang(杨益新), Yuan-Liang Ma(马远良), Dong-Xu Chen(陈东旭) |
| School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China |
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Abstract Acoustic scattering from a rough sea bottom is recognized as a main source of reverberation. In this study, scattering properties from a layered bottom were exploited based on the finite element model. The scattering strength and loss from the layered rough seabed were investigated by ensembling the realizations of rough interface. They were found to be dependent on the thickness of sediment, and interference was significant in the case of thin sediment. Through verification of the finite element model, the scattering loss could be evaluated using the Eckart model with a proper sound speed in the thick sediment. The multiple scattering effect on the sound field was also exploited. It revealed that the effect depended strongly on the bottom type.
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Received: 25 July 2016
Revised: 27 September 2016
Accepted manuscript online:
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PACS:
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43.30.Hw
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(Rough interface scattering)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61571366), the Natural Science Basic Research in Shaanxi Province of China (Grant No. 2015JQ5199), and the Fund of Science and Technology from the Underwater Test and Control Laboratory (Grant No. 9140c260201130c26096). |
Corresponding Authors:
Yi-Xin Yang
E-mail: yxyang@nwpu.edu.cn
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Cite this article:
Bo Lei(雷波), Yi-Xin Yang(杨益新), Yuan-Liang Ma(马远良), Dong-Xu Chen(陈东旭) Research on the acoustic scattering function and coherence properties from rough seafloor based on finite element model 2016 Chin. Phys. B 25 124312
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