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The use of air-coupled or submerged transducers for the ultrasonic inspection of
composite plates involves the development of adequate mathematical and computer models
for simulating the occurring wave processes. In achieving this goal, an analytically based
computer model has been developed. On this base, the directivity of the source-generated
wave fields caused by the anisotropy of an immersed composite plate as well as the influence
of fluid loading is investigated. A series of numerical examples illustrating angular
dependence and independence of the wavenumbers, attenuations and amplitude factors of the
waves of different kinds excited in the coupled source-fluid-plate structures are presented and
discussed.
Keywords: immersed anisotropic plate, acoustic fluid, integral and asymptotic representations, guided waves |
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