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中文核心期刊

Volume 46 Issue 1
Jun.  2022
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CHEN Wenjian, LI Fubing, YIN Jingwei, ZHOU Shunbo, SUN Hui, LANG Pengyuan. A Kirchhoff-approximation numerical model for three-dimensional acoustic scattering from rough under-ice surfaces[J]. ACTA ACUSTICA, 2021, 46(1): 1-10. DOI: 10.15949/j.cnki.0371-0025.2021.01.001
Citation: CHEN Wenjian, LI Fubing, YIN Jingwei, ZHOU Shunbo, SUN Hui, LANG Pengyuan. A Kirchhoff-approximation numerical model for three-dimensional acoustic scattering from rough under-ice surfaces[J]. ACTA ACUSTICA, 2021, 46(1): 1-10. DOI: 10.15949/j.cnki.0371-0025.2021.01.001
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A Kirchhoff-approximation numerical model for three-dimensional acoustic scattering from rough under-ice surfaces

  • 1. Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001;

  • 2. Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University), Ministry of Industry and Information Technology, Harbin 150001;

  • 3. College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001;

  • 4. School of Information and Communication Engineering, Beijing Information Science and Technology University, Beijing 100101

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  • PACS: 
  • Received Date: May 27, 2020
  • Revised Date: October 12, 2020
  • Available Online: June 24, 2022
    Graphical Abstract
    • Abstract
  • A Kirchhoff-approximation numerical method of three-dimensional acoustic scattering from a rough underice surface is presented.Delaunay triangulation is used to triangulate a Gaussian rough under-ice surface,the Z-buffer algorithm is used to remove the surface elements in the shadowed areas and obtain those in the bright areas,and the scattering intensity is calculated by the planar element method of Gordon’s integration.In the numerical calculation model,the ice surface is regarded as one of local impedance,thereby incorporating it directly into the local reflection coefficient of the rough under-ice surface to calculate the scattering sound field and avoiding the approximation of the reflection coefficient in the analytical calculation model.The scattering intensities of the numerical and analytical models are compared for under-ice surfaces with large and small roughness and for different incident angles and frequencies.Of the two types of results,those of the numerical calculation model are more consistent with measurements.
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