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Untersuchungen über periodische Wellen, exponentielle und komplexe Nahfelder im begrenzten Festkörper

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The boundary conditions for the complete elastic equations describing the vibrations of a bounded solid cannot be fulfilled by assuming periodic waves only, but waves with complex and real propagation constants are required in addition.

After characterizing the hitherto exactly solved and unsolved vibration problems of this kind, a discussion of all wave-forms occuring in an infinitely extended homogeneous, nondissipative plate is given.

Besides the propagation factors — phase velocity, damping, group velocity and energy flux — the distributions of stress and particle velocity across the section are investigated. Differences between the sound propagation in a liquid and a solid are pointed out.
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Document Type: Research Article

Publication date: January 1, 1959

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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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