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A simulation based study of low frequency transient sound radiation from floors - A concrete vs. a hybrid floor
Linnaeus University, Sweden.
RISE - Research Institutes of Sweden, Samhällsbyggnad, Byggteknik.ORCID-id: 0000-0002-0019-4568
2017 (Engelska)Ingår i: 24th International Congress on Sound and Vibration, ICSV 2017, 2017Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Timber is a renewable and human friendly construction material and thereby a potential solution to achieve life cycle sustainable buildings. However, it is clear that impact sound and vibrations wit hin the low frequency range still are challenges for wooden joist floors. Another challenge is the, mostly, larger building heights of wooden or hybrid floors compared to the heights of concrete floors. Using timber as the structural joist floor material could imply fewer stories due to maximum allowed building heights, which renders in less income in a building project. Accurate simulations of impact sound may decrease the need for prototypes; thus saving money and time in the timber building industry. Here, a hybrid joist floor consisting of wood, sand and steel is compared to a concrete floor in terms of radiated impact sound into a rectangular cavity. The hybrid floor is designed such that its mass distribution and globa l stiffness are close to the same properties of the concrete floor. Finite element models are used for simulations of the radiated transient sound induced by impact forces having the characteristics of human walking. The simulations indicate that similar surface mass and bending stiffness of a floor intersection give similar impact sound transmission properties around the first bending mode, while it is not necessary so at higher frequencies.

Ort, förlag, år, upplaga, sidor
2017.
Nyckelord [en]
Impact sound, Simulation, Timber buildings, Acoustic waves, Architectural acoustics, Building materials, Buildings, Concrete construction, Concretes, Construction industry, Finite element method, Intelligent buildings, Life cycle, Stiffness, Timber, Wooden buildings, Wooden floors, Higher frequencies, Impact sound transmissions, Low frequency range, Rectangular cavity, Sustainable building, Floors
Nationell ämneskategori
Naturvetenskap
Identifikatorer
URN: urn:nbn:se:ri:diva-33134Scopus ID: 2-s2.0-85029438254OAI: oai:DiVA.org:ri-33134DiVA, id: diva2:1179102
Konferens
24th International Congress on Sound and Vibration, ICSV 2017, 23 July 2017 through 27 July 2017
Anmärkning

 Funding details: National Space Biomedical Research Institute; Funding details: Knowledge Foundation; Funding details: University of Miami

Tillgänglig från: 2018-01-31 Skapad: 2018-01-31 Senast uppdaterad: 2020-01-22Bibliografiskt granskad

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Olsson, Jörgen

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Totalt: 26 träffar
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