The effect of modelling acoustic media in cavities of lightweight buildings on the transmission of structural vibrations

Determining the dynamic behaviour of lightweight buildings by means of finite element analyses requires models representing the geometry involved in great detail, resulting in systems having many millions of degrees of freedom. It is, therefore, important to avoid unnecessarily detailed models by carefully considering what is essential to include in the models and the level of details required for describing the phenomena of interest accurately. In the study presented here, it was investigated whether or not air and insulation in cavities of multi-storey wood buildings affect the transmission of low-frequency structural vibrations. It was concluded, by means of numerical studies, that including air and insulation in cavities, modelled as acoustic media, affects the transmission from a floor to the underlying ceiling and surrounding walls. (C) 2014 Elsevier Ltd. All rights reserved. (Less)

[1]  Juan Negreira,et al.  Finite Element Modelling of a Timber Volume Element Based Building with Elastic Layer Isolators. AkuLite Report 11 , 2013 .

[2]  Raymond Panneton,et al.  Acoustical determination of the parameters governing viscous dissipation in porous media. , 2006, The Journal of the Acoustical Society of America.

[3]  Raymond Panneton,et al.  Comments on the limp frame equivalent fluid model for porous media. , 2007, The Journal of the Acoustical Society of America.

[4]  Gerhard A. Holzapfel,et al.  Nonlinear Solid Mechanics: A Continuum Approach for Engineering Science , 2000 .

[5]  G. Kirchhoff,et al.  Ueber den Einfluss der Wärmeleitung in einem Gase auf die Schallbewegung , 1868 .

[6]  Juan Negreira.  Vibrations in Lightweight Buildings - Perception and Prediction , 2013 .

[7]  R. Clough,et al.  Dynamics Of Structures , 1975 .

[8]  Poul Henning Kirkegaard,et al.  Influence of Wall Surface and Air Modelling in Finite-Element Analysis of Sound Transmission Between Rooms in Lightweight Buildings , 2012 .

[9]  L. Hervella-Nieto,et al.  Review in Sound Absorbing Materials , 2008 .

[10]  Keith Attenborough,et al.  Acoustical characteristics of porous materials , 1982 .

[11]  M. Biot.  Theory of Propagation of Elastic Waves in a Fluid‐Saturated Porous Solid. I. Low‐Frequency Range , 1956 .

[12]  J. Allard.  Propagation of Sound in Porous Media: Modelling Sound Absorbing Materials , 1994 .

[13]  Y. Miki.  Acoustical Properties of porous materials : Modifications of Delany-Bazley models , 1990 .

[14]  Peter Göransson.  Acoustic finite element formulation of a flexible porous material—a correction for inertial effects , 1995 .

[15]  C. Zwikker,et al.  Sound Absorbing Materials , 1949 .

[16]  Alessandro Schiavi,et al.  Effect and importance of static-load on airflow resistivity determination and its consequences on dynamic stiffness , 2011 .

[17]  H. Petersson,et al.  Introduction to the finite element method , 1992 .

[18]  Naoki Kino,et al.  Experimental determination of the micro- and macrostructural parameters influencing the acoustical performance of fibrous media , 2007 .

[19]  K. Bathe.  Finite Element Procedures , 1995 .

[20]  Birgit Östman,et al.  Acoustics in wooden buildings. State of the art 2008 , 2008 .

[21]  W. A. Davern,et al.  Calculation of acoustic impedance of multi-layer absorbers , 1986 .

[22]  Takeshi Komatsu,et al.  Improvement of the Delany-Bazley and Miki models for fibrous sound-absorbing materials , 2008 .

[23]  Anders Ågren,et al.  Potential solutions to improved sound performance of volume based lightweight multi-storey timber buildings , 2011 .

[24]  E. N. Bazley,et al.  Acoustical properties of fibrous absorbent materials , 1970 .

[25]  Lars Vabbersgaard Andersen,et al.  Mitigation of Flanking Noise in Double-Plate Panel Structures by Periodic Stiffening: finite element analysis in the low-frequency range , 2011 .

[26]  Poul Henning Kirkegaard,et al.  TRANSMISSION OF SOUND THROUGH DOUBLE-PLATE PANEL STRUCTURES - A NUMERICAL STUDY OF COUPLING PARAMETERS IN LIGHTWEIGHT PANEL STRUCTURES , 2011 .

[27]  A. Cummings,et al.  Prediction of the bulk acoustic properties of fibrous materials at low frequencies 1 A shorter versi , 1999 .