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应用科学学报 ›› 1999, Vol. 17 ›› Issue (3): 289-295.

• 论文 • 上一篇    下一篇

对透声界面的时域有限差分处理

汪彤, 王朔中   

  1. 上海大学
  • 收稿日期:1997-07-21 修回日期:1998-02-19 出版日期:1999-09-30 发布日期:1999-09-30
  • 基金资助:
    国家自然科学基金资助项目(69572022)

Finite-Difference Time-Domain Treatment for Interfaces Penetrating Sound Waves

WANG TONG, WANG SHUOZHONG   

  1. Shanghai University, Shanghai 200072
  • Received:1997-07-21 Revised:1998-02-19 Online:1999-09-30 Published:1999-09-30

PDF

54

被引次数

7

摘要： 导出了水中透声目标表面边界条件的时域有限差分(FDTD)表达形式,将FDTD在水声学中的应用范围扩大到无切应力的有限声阻抗目标的散射问题.在此基础上对一些目标的散射特性进行数值计算,给出了满意的声场分布.计算结果与理论解十分吻合.

关键词: 声散射, 时域有限差分法, 有限声阻抗

Abstract: Expressions for the treatment of interfaces penetrating sound waves, which is used in the finite-difference time-domain modeling of underwater acoustics, are derived. The proposed finite-difference boundary condition expands the scope of application of FDTD to scattering problems of objects with a finite acoustic impedance but without tangential stress. Numerical experiments have been carried out for several scattering problems, which give satisfactory field distributions. All the computation results are in good agreement with theoretical solutions.

Key words: finite-difference time-domain (FDTD) method, finite acoustic impedance, sound scattering