This paper deals with acoustic effects of ribs on sound radiation. This question has been raised by the difficulties encountered in boundary element modelling for structural details like ribs. The final objective is to improve modelling and design of ribs in an acoustic radiation sense. In the prese
ON ACOUSTIC RADIATION RESISTANCE OF PLATES
β Scribed by K. Renji; P.S. Nair; S. Narayanan
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 260 KB
- Volume
- 212
- Category
- Article
- ISSN
- 0022-460X
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β¦ Synopsis
It is reported that when both sides of a plate radiate into a reverberant room, the radiation resistance obtained experimentally is approximately half of the values obtained using theoretical expression. Hence, it was suggested to use plate area as the radiating area instead of using double the plate area as radiating area which is not logical. In this paper the reasons for the above anomaly are investigated. It is found that the error is not in the radiating area but in the expression for radiation resistance itself. New expressions for radiation resistance are suggested. Experimental results compare well with the theoretical results.
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A detailed numerical investigation of the coupling between the vibration of a flexible plate and the ensuing acoustic radiation is described. The non-linear Euler equations are used to describe the acoustic fluid, while the non-linear von KΓ‘rmΓ‘n plate equations are used to describe the plate respons
A theoretical model is developed for acoustic radiation from a plate into a porous medium. The medium is modelled as an equivalent fluid with complex density and complex wavespeed. It is found that radiation from a finite plate is dominated by area radiation at all frequencies, unlike the case for r