中国物理B ›› 2010, Vol. 19 ›› Issue (5): 54301-054301.doi: 10.1088/1674-1056/19/5/054301

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Physical model of acoustic forward scattering by cylindrical shell and its experimental validation

雷波, 杨坤德, 马远良   

  1. College of Marine, Northwestern Polytechnical University, Xi'an 710072, China
  • 收稿日期:2009-09-13 修回日期:2009-10-23 出版日期:2010-05-15 发布日期:2010-05-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No.~10774119), the program for New Century Excellent Talents in University, China (Grant No.~NCET-08-0455), the Natural Science Foundation of Shaanxi province, China (Grant No. SJ08F07), the Foundation of National Laboratory of Acoustics, and the Northwestern Polytechnical University NPU Foundation for Fundamental Research, China (Grant No.~2007004).

Physical model of acoustic forward scattering by cylindrical shell and its experimental validation

Lei Bo(雷波)†, Yang Kun-De(杨坤德), and Ma Yuan-Liang(马远良)   

  1. College of Marine, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2009-09-13 Revised:2009-10-23 Online:2010-05-15 Published:2010-05-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No.~10774119), the program for New Century Excellent Talents in University, China (Grant No.~NCET-08-0455), the Natural Science Foundation of Shaanxi province, China (Grant No. SJ08F07), the Foundation of National Laboratory of Acoustics, and the Northwestern Polytechnical University NPU Foundation for Fundamental Research, China (Grant No.~2007004).

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摘要： Research on the underwater target scattering can provide important theoretical support for target detection. The scattering model of cylindrical shell is established in this paper. It is found that the forward target strength is much stronger and varies with angles of incident wave less significantly than backward target strength. The received forward signal strength fluctuates with the target moving due to the interference between direct signal and scattering signal, which is most significant when target approaches the baseline. An experiment is carried out in an anechoic tank to validate the scattering model. The method of acquisiting forward scattering in the tank is proposed. The forward and the backward target strengths are achieved by using the pulse compression technology, and they are about 3dB less than the modeling results. The forward scattering phenomena of quiescent and moving target are measured, which are similar to modeling results with different target types.

Abstract: Research on the underwater target scattering can provide important theoretical support for target detection. The scattering model of cylindrical shell is established in this paper. It is found that the forward target strength is much stronger and varies with angles of incident wave less significantly than backward target strength. The received forward signal strength fluctuates with the target moving due to the interference between direct signal and scattering signal, which is most significant when target approaches the baseline. An experiment is carried out in an anechoic tank to validate the scattering model. The method of acquisiting forward scattering in the tank is proposed. The forward and the backward target strengths are achieved by using the pulse compression technology, and they are about 3dB less than the modeling results. The forward scattering phenomena of quiescent and moving target are measured, which are similar to modeling results with different target types.

Key words: scattering model, forward scattering, target strength, shell

中图分类号:  (Volume scattering)

  • 43.30.Ft
43.30.Es (Velocity, attenuation, refraction, and diffraction in water, Doppler effect)