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Reflection and Transmission of Structural Waves at an Interface Between Doubly Curved Shells

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Reflection and transmission coefficients are derived for waves on doubly curved thin shells scattered by an interface of structural discontinuity. The coefficients are contained in an 8 × 8 S–matrix which describes all possible interaction modes between the 4 wave types on either side of the interface: quasi-longitudinal, quasi-shear, quasi-flexural, and quasi-evanescent flexural. The structural interface may be misaligned in the sense that the centroidal planes are displaced relative to one another, leading to mode mixing even for flat plate junctions. Some fundamental properties of the S–matrix are derived, including reciprocity and the fact that the sub-matrix associated with propagating (non-evanescent) shell waves is unitary.
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Document Type: Research Article

Publication date: November 1, 1998

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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