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Floating Floor Attenuation of Impact Structure-borne Sound in Timber Construction

Show simple item record Hacene-Djaballah, Nouri
dc.creator Hacene-Djaballah, Nouri 2009-05-01 2009-07-25T22:49:00Z NO_RESTRICTION en 2009-07-25T22:49:00Z 2009-07-25T22:49:00Z
dc.description.abstract The transmission of footfall-excited impact sound is commonly reduced using floating floors. The most basic of these constructions contains three layers – a resilient material, a load-bearing floor, and a floating slab. According to a literature review, a single degree-of-freedom (SDOF) vibration isolation model theoretically predicts impact sound reduction when assuming harmonic loading and a rigid load-bearing floor. However, for timber layers excited by transient loading (e.g. footsteps), sound reduction estimations may contain uncertainties due to inadequate modeling of footsteps and/or floor components. Therefore, this research presents a technique for modeling timber floating floors, as multiple degree-of-freedom (MDOF) systems, using the rigid body dynamics software Working Model 2D® (WM2D). WM2D is first used to verify the SDOF case, by comparing software-generated impact sound reduction plots to graphs found in the literature. Results show agreement between both sources, though with slight error in predicting resonance values. Next, an MDOF model is created with a transversely orthotropic and flexible timber load-bearing floor along with mechanical systems representing the footstep and resilient layer. The impact sound reduction graph for the MDOF system achieves higher values than the SDOF case, which can be attributed to additional resiliencies from flexible beams. Also, regions within the graph resemble the sound reduction plot for the SDOF case.
dc.language.iso en_US en
dc.subject Floating floor en_US
dc.subject Timber en_US
dc.subject footstep en_US
dc.subject Working Model 2D en_US
dc.subject Structure-borne sound en_US
dc.title Floating Floor Attenuation of Impact Structure-borne Sound in Timber Construction en
dc.type Thesis en Master of Science in Civil, Environmental, and Infrastructure Engineering en Master's en Civil and Infrastructure Engineering en George Mason University en

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