Two modeling approaches for periodic rib-stiffened plates typical of floor assemblies

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ConferenceProceedings of 14th International Congress on Sound and Vibration: 09 July 2007, Cairns, Australia
Pages18; # of pages: 8
Subjectflanking, model, prediction, impact sound; Floors
AbstractFloors in lightweight framed construction are periodic orthotropic point connected plate-rib structures formed from orthotropic wood sheathing and a series of joists spaced at a regular interval. These structures are driven into motion by point excitations from people walking, dropping objects, etc. To accurately estimate flanking involving mechanical excitation one must predict the injected power using the mobility of the source and structure, and then estimate the resulting vibration distribution across the periodic floor structure. By examining two prediction approaches ? SEA and an analytical solution for an assembly of finite sized plates ? this paper shows that the more complex analytic solution gives a much better estimate of the vibration distribution, and is the only method capable of capturing the spatial dependence of the drive-point mobility. The analytic model is then used to identify the parameters of a joist floor that should be considered when designing a floor that has good low frequency impact sound insulation.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number49469
NPARC number20377202
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Record identifierf6017659-e43b-4658-9a87-5d3137eb441f
Record created2012-07-24
Record modified2016-05-09
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