【摘要】 本文运用几何衍射理论,结合空间Fourier变换,讨论了窄声束在有限长刚性圆柱上的反向散射。并对理论结果作了实验验证。更多还原

【Abstract】 In discussion backscattering from a finite object due to a narrow sound beam, a hybrid (wave/geometrical) theory is proposed. In this paper, a finite-length rigid circular cylinder is considered. The incident wave beam is expanded by means of Fourier transformation in space domain and is expressed as a plane wave with a beam factor. Using the geometrical theory of diffraction (GTD) the backscattering from a finite-length rigid circular cylinder due to a narrow sound beam is obtained. It is shown that the solution predicted by the hybrid theory is fairly confirmed by the model experiment.更多还原