Regression curves for vibration transmission across junctions of heavyweight walls and floors based on finite element methods and wave theory

Hopkins, Carl ORCID: 0000-0002-9716-0793, Crispin, Charlotte, Poblet-Puig, Jordi and Guigou-Carter, Catherine (2016) Regression curves for vibration transmission across junctions of heavyweight walls and floors based on finite element methods and wave theory. APPLIED ACOUSTICS, 113. pp. 7-21.

Text
Hopkins Crispin Poblet-Puig Guigou-Carter Kij regression curves from FEM and wave theory Applied Acoustics 2016.pdf - Author Accepted Manuscript
Download (1MB)

Official URL: http://dx.doi.org/10.1016/j.apacoust.2016.06.002

Abstract

Sound insulation prediction models in European and International Standards use the vibration reduction index to calculate flanking transmission across junctions of walls and floors. These standards contain empirical relationships between the ratio of mass per unit areas for the walls/floors that form the junction and a frequency-independent vibration reduction index. However, calculations using wave theory show that there is a stronger relationship between the ratio of characteristic moment impedances and the transmission loss from which the vibration reduction index can subsequently be calculated. In addition, the assumption of frequency-independent vibration reduction indices has been shown to be incorrect due to in-plane wave generation at the junction. Therefore numerical experiments with FEM, SFEM and wave theory have been used to develop new regression curves between these variables for the low-, mid- and high-frequency ranges. The junctions considered were L-, T- and X-junctions formed from heavyweight walls and floors. These new relationships have been implemented in the prediction models and they tend to improve the agreement between the measured and predicted airborne and impact sound insulation.

Item Type:	Article
Uncontrolled Keywords:	Sound insulation, Vibration reduction index, Finite elements, Wave theory, Plates, Junctions
Depositing User:	Symplectic Admin
Date Deposited:	24 Jun 2016 13:30
Last Modified:	19 Jan 2023 07:35
DOI:	10.1016/j.apacoust.2016.06.002
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3001834