Rayleigh and Lamb Waves on Cylinders
Rayleigh and Lamb Waves on Cylinders
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圆柱上的瑞利波和兰姆波
DOI：
10.1121/1.1911844
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发表时间：
1969
影响因子：
2.4
通讯作者：
S. W. Marshall
中科院分区：
文献类型：
--
作者：
R. Bunney;R. Goodman;S. W. Marshall
本文观察了声波在水中实心和空心弹性圆柱表面的传播，其特性与理论相符。这些波由11微秒脉冲激发，以sin 1（co/cs）给出的激发角投射到圆柱表面上，其中co是水中的声速，cs是表面波的速度。可以观察到波浪，因为它们以激发角连续地将能量辐射回水中。在纯铝（98%）、304不锈钢和各种铝合金圆柱体上观察到表面波。周长与波长的比值从10到400不等，以辨别由于目标曲率引起的色散效应。有人还发现，不均匀性与纯传播特性在一些目标。在浸没在水中的充空气和充水圆柱体上观察到的波对应于壳体中的对称和反对称振动。
Acoustic waves propagating on the surface of solid and hollow elastic cylinders immersed in water were observed and their characteristics shown to be consistent with theory. These waves were excited by an 11‐μsec pulse, projected onto the cylindrical surface at an excitation angle given by sin 1(co/cs), where co is the velocity of sound in water and cs is the velocity of the surface wave. The waves may be observed, since they continually radiate energy back into the water at the excitation angle. Surface waves were observed to exist on pure (98%) aluminum, 304 stainless steel, and various aluminum‐alloy cylinders. Circumference‐to‐wavelength ratios were varied from 10 to 400 to discern the dispersive effects owing to the curvature of the target. It was also found that inhomogeneities correlate with pure propagation characteristics in some of the targets. The waves observed on air‐ and water‐filled cylinders immersed in water are shown to correspond to the symmetric and antisymmetric vibrations in the shell.