有限入射声束在液固界面声反射的数值研究

采用将有限声束分解为一系列平面波的方法，对液固界面声束的声反射问题进行了数值研究，结果表明，当声束入射角为瑞利疲激角时，反射声速有明显位移；当声束在液固界面“掠射”时，反射声速显著变宽，文中还讨论了束宽对反射声速横截面上声场分布的影响。

Numerical study of the reflection of a bounded acoustic beam at the interface between liquid and solid

Numerical analyses have been performed for the reflection of a bounded acoustic beam at the interface between a liquid and a solid,by decomposing the acoustic beam into a series of plane waves.The results show that the refiected beam will displace along the interface whenever the incident angle of the incoming acoustic beam equals the angle of excitation of a Rayleigh wave, and that the refiected beam will expand at the glancing incidence. The effect of the incident beam width on the acoustic field at the reflected beam cross section is also discussed.