Defence Science and Technology Laboratory, Porton Down, Salisbury, Wilts SP4 0JQ, United Kingdom.
J Acoust Soc Am. 2010 Sep;128(3):973-88. doi: 10.1121/1.3459854.
Solutions for the diffraction of a plane wave from the edge of a semi-infinite, thin elastic plate are presented. A thin plate formulation that takes into account the coupling into both symmetric and antisymmetric waves on the plate is used. The symmetric contributions are found to be small for steel in water but can be significant for plastic plates. Expansions in terms of the fluid loading parameter are used in the far field of the edge to explore the effect of the diffraction from a single edge on transmission measurements. Examples for steel and polymethylmethacrylate in water are presented.
给出了平面波从半无限薄弹性板边缘衍射的解决方案。使用了一种薄板公式，该公式考虑了板上对称波和反对称波的耦合。对于水中的钢板，对称分量很小，但对于塑料板可能很重要。在边缘的远场中使用流体加载参数的展开来探讨单个边缘衍射对透射测量的影响。给出了钢和聚甲基丙烯酸甲酯在水中的例子。
