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Körperschallausbreitung auf Balken mit vielen Störstellen

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Four different methods for the calculation of structure-borne sound propagation on beams with many discontinuities are presented. The methods are based on 1. equivalent sources (scattering), 2. Hamilton's principle, 3. energy considerations for a purely periodic system, 4. statistical energy considerations after [5] that lead to equations of the heat conduction type. In three of the methods conversion of bending waves into longitudinal waves and vice versa is taken into account.

Zusammenfassung

Es werden vier verschiedene Methoden vorgestellt, die dazu verwendet werden können, die Körperschallausbreitung auf einem Balken mit vielen Störstellen zu berechnen. Es handelt sich dabei um eine Ersatzquellenmethode (Streuung), um die Anwendung des Hamiltonschen Prinzips, um Energiebetrachtungen für ein streng periodisches System und um eine statistische Energiebetrachtung nach [5], die zu Gleichungen von Typ der Wärmeleitungsgleichung führt. Bei drei der Methoden wird die Umwandlung von Biegewellen in Longitudinalwellen – und umgekehrt – berücksichtigt.

Sommaire

On présente quatre méthodes différentes, utilisables pour les calculs de propagation de vibrations solidiennes dans des poutres présentant plusieurs discontinuités. L'une des méthodes exploite un principe de sources équivalentes, l'autre le principe de Hamilton, une troisième est basèe sur des considérations énergétiques dans un système purement périodique et la quatrième reprend une approche statistique décrite dans [5], qui conduit à des équations du type équation de propagation de la chaleur. Trois des méthodes prennent en considération la transformation des ondes de flexion en ondes longitudinales.
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Document Type: Research Article

Publication date: September 1, 1995

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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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