Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/9059
Title: The effect of a concrete plinth on structure-borne sound power transmission : theory and numeric simulations
Authors: Zu, F
Mak, CM 
Keywords: Concrete plinth
Distributed mass
Eigenfrequencies
Modal functions
Power transmissibility
Issue Date: 2011
Publisher: SAGE Publications
Source: Journal of low frequency noise, vibration and active control, 2011, v. 30, no. 2, p. 107-123 How to cite?
Journal: Journal of low frequency noise, vibration and active control 
Abstract: Concrete plinths are commonly used by engineers as a base for vibratory building services machines. However, it is not clear what effects they have on the structure-borne sound power transmission and the eigenfrequencies of floors. In this paper, the modal functions, eigenfrequencies, and mobility expression of a floor with a concrete plinth attached are deduced. The power transmissibility method is used to analyze the effect of a concrete plinth on the power transmissibility that is used to assess the performance of vibration isolation. It is found that the effect of a concrete plinth is mainly to decrease the eigenfrequencies of the floor, and changing the thickness of the concrete plinth has a greater effect on the eigenfrequencies of the floor and the power transmissibility than does changing the area of the concrete plinth. An estimated equation for power transmissibility is formulated.
URI: http://hdl.handle.net/10397/9059
ISSN: 1461-3484
EISSN: 2048-4046
DOI: 10.1260/0263-0923.30.2.107
Appears in Collections:Journal/Magazine Article

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