Abstract
For an elastic plate immersed in a lossless fluid, it is known that resonances of leaky Lamb modes contribute to the transmission coefficient in a manner dependent on the resonance widths. Based on numerical solutions in the complex wave-number field, an examination of such resonance widths is presented here. For plates of different materials and for water and air loadings, families of curves of Lamb mode angular resonance width versus frequency are seen to yield a consistency of pattern. For air loading, the widths are 31/2 orders smaller than for water loading. Frequency resonance widths are found to be two orders greater than angular resonance widths. Nulls in the resonance width curves provide added insight into the cause of published experimental nonobservance of radiation effects for individual Lamb modes.
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