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Abstract

Direct and indirect measurements of the vibration response of several wood-framed walls and floors were made. The data indicate that these building elements do not behave like a homogeneous and isotropic system but rather exhibit a response typical of a periodic plate/beam structure. There is localization of energy near the excitation point and very strong attenuation with distance in the direction normal to the framing members. This region of high attenuation is followed by one of considerably reduced attenuation. A systematic study of a floor/ceiling assembly indicated that the onset of this second attenuation region was caused by the presence of a butt joint in the plate. It is speculated that the weak bending-to-bending coupling caused by the butt joint reduced the bending energy enough so that wave conversion from in-plane to bending at each plate/beam joint accounted for the presence (and in some cases near-constant level) of bending energy after the butt joint.

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References

“Building Acoustics—Estimation of acoustic performance of buildings from the performance of products-Part I: Airborne sound insulation between rooms,” European Standard EN 12354–1, (1996).

“Building Acoustics—Estimation of acoustic performance of buildings from the performance of products-Part II: Impact sound insulation between rooms,” European Standard EN 12354–2, (1996).

Larsson

, “Using modal analysis for estimation of anisotropic material constants,” Journal of Engineering Mechanics, Vol. 123, pp. 222–229, (1997).

Craik

R.J.M.

Smith

R.S.

, “Sound transmission through lightweight parallel plates. Part II: Structure-borne sound,” Submitted to Applied Acoustics, (1999).

Bosmans

Ivan

Nightingale

T.R.T.

, “Structure-Borne Sound Transmission in Rib Stiffened Plate Structures Typical Of Wood Frame Buildings,” submitted to Journal of Building Acoustics, Special Issue ASA-EAA-DEGA Berlin 99.

Steel

J.A.

Craik

R.J.M.

Wilson

, “A study of vibration transmission in a framed building,” Building Acoustics, Vol. 1, pp. 49–64, (1994).

Langley

R.S.

, “An elastic wave technique for the free vibration analysis of plate assemblies,” Journal of Sound and Vibration, Vol. 145, pp. 261–277, (1991).

Langley

R.S.

, “On the forced response of structures,” Journal of Sound and Vibration, Vol. 178, pp. 411–428, (1994).

Langley

R.S.

, “On the modal density and energy flow characteristics of periodic structures,” Journal of Sound and Vibration, Vol. 172, pp. 491–511, (1994).

10.

Pierre

Dowel

E.H.

, “Localization of vibrations by structural irregularity,” Journal of Sound and Vibration, Vol. 114, pp. 549–564, (1987).

11.

Chui

Y.H.

, “Simultaneous evaluation of bending and shear moduli of wood and the influence of knots on these parameters,” Wood Science and Technology, Vol. 25, pp. 125–134, (1991).

12.

Mead

D.J.

Markus

, “Coupled flexural-longitudinal wave motion in a periodic beam,” Journal of Sound and Vibration, Vol. 90, pp. 1–24, (1983).

13.

Keane

A.J.

Price

W.G.

, “Statistical Analysis of Periodic Structures,” Proceedings of the Royal Society of London, A423, pp. 331–360, (1989).

14.

Tso

Y.K.

Hansen

C.H.

, “The transmission of vibration through a coupled periodic structure,” Journal of Sound and Vibration, Vol. 215, pp. 63–79, (1998).

15.

Mead

D.J.

Markus

, “Coupled flexural-longitudinal wave motion in a periodic beam,” Journal of Sound and Vibration, Vol. 90, pp. 1–24, (1983).

16.

Craik

R.J.M.

, “The measurement of structure-borne sound transmission using impulsive sources,” Applied Acoustics, Vol. 15, pp. 355–361, 1982.

17.

Craik

R.J.M.

, “Sound Transmission through Buildings using Statistical Energy Analysis,” Gower, Aldershot, Hampshire, UK,1996.

Vibration Response of Lightweight Wood Frame Building Elements

Abstract

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