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Schallabstrahlung eines Zylinders vor einer Wand

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This paper deals with the calculation of the sound radiation of a cylinder placed in front of a wall with arbitrary reflexion properties. Two multipoles are used, which are situated symmetrically on either side of the wall. The influence of different parameters on the quality of the model, as well as the application of this model to a tyre on a porous surface are discussed.

Zusammenfassung

Im Vordergrund steht die Frage, wie man die Schallabstrahlung eines beliebig schwingenden Zylinders vor einer Wand mit frei wählbaren Reflexionseigenschaften berechnen kann. Dabei werden zwei Ersatzstrahler benutzt, die symmetrisch zu beiden Seiten der Wand angeordnet sind (Spiegelquellenprinzip).

Die Genauigkeit, mit der das gewünschte Schallfeld angenähert wird, hängt vor allem von der Unstetigkeit im Berührpunkt zwischen Zylinder und Wand ab. Untersucht wird, welche Parameter die Genauigkeit beeinflussen und wie dieses Modell zur Berechnung der Schallabstrahlung eines Reifens auf poröser Fahrbahn übertragen werden kann.

Sommaire

On s'est posé la question de trouver le rayonnement acoustique d'un cylindre vibrant d'une manière arbitraire devant un mur possédant des propriétés réflectrices librement choisies. On y arrive en utilisant deux sources auxiliaries placees symétriquement par rapport aux deux côtés du mur, conformément au principe des sourcesmiroirs.

La précision avec laquelle on peut approcher le champ acoustique recherché dépend avant tout de la stabilité du contact ponctuel entre le cylindre et le mur On a recherché également les autres paramètres capable d'agir sur la précision du résultat. Puis on a étudié la possibilité d'étendre ce modèle au calcul du rayonnement acoustique d'un cerceau roulant sur une piste poreuse.
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Document Type: Research Article

Publication date: September 1, 1990

More about this publication?
  • 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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