Advanced

A wave approach to structural transmission loss in periodic structures: Thin beam case

Brunskog, Jonas LU (2005) In Acta Acustica united with Acustica 91(1). p.91-102
Abstract
When new building systems are developed, these are often lightweight constructions with a periodical set of stiffeners, developed for use in load-bearing structures and dwellings. One of the main drawbacks of this type of building systems is the sound insulation, where flanking transmission is an important issue. A prediction model for flanking transmission of lightweight building structures is thus under development. This paper is a theoretical study of the structural transmission coefficient of a junction, using a propagating wave approach. Free waves travel in the periodic wave-medium. The periodic resilient elements consist of rotation and displacement springs. The free waves meet a discontinuity (or junction), and the power... (More)
When new building systems are developed, these are often lightweight constructions with a periodical set of stiffeners, developed for use in load-bearing structures and dwellings. One of the main drawbacks of this type of building systems is the sound insulation, where flanking transmission is an important issue. A prediction model for flanking transmission of lightweight building structures is thus under development. This paper is a theoretical study of the structural transmission coefficient of a junction, using a propagating wave approach. Free waves travel in the periodic wave-medium. The periodic resilient elements consist of rotation and displacement springs. The free waves meet a discontinuity (or junction), and the power transmitted through the discontinuity is then studied. The discontinuity consists of a mechanical coupling and point mass load. The model is analytic and deterministic, and makes use of a spatial Fourier transform wave approach for periodic structures. The approach is intended for flanking transmission of lightweight building structures, but it is also applicable for structures such as ships and aircraft. Numerical results are presented and discussed. It is concluded that the periodic nature of the wave media affects the power transmitted through a discontinuity. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Acta Acustica united with Acustica
volume
91
issue
1
pages
91 - 102
publisher
Hirzel Verlag
external identifiers
  • wos:000227288700008
  • scopus:14544271868
ISSN
1861-9959
language
English
LU publication?
yes
id
5295e936-a1a2-4e81-a983-c9da1c0d38be (old id 252190)
alternative location
http://www.ingentaconnect.com/content/dav/aaua/2005/00000091/00000001/art00008
date added to LUP
2007-08-02 13:24:07
date last changed
2017-01-01 05:08:26
@article{5295e936-a1a2-4e81-a983-c9da1c0d38be,
  abstract     = {When new building systems are developed, these are often lightweight constructions with a periodical set of stiffeners, developed for use in load-bearing structures and dwellings. One of the main drawbacks of this type of building systems is the sound insulation, where flanking transmission is an important issue. A prediction model for flanking transmission of lightweight building structures is thus under development. This paper is a theoretical study of the structural transmission coefficient of a junction, using a propagating wave approach. Free waves travel in the periodic wave-medium. The periodic resilient elements consist of rotation and displacement springs. The free waves meet a discontinuity (or junction), and the power transmitted through the discontinuity is then studied. The discontinuity consists of a mechanical coupling and point mass load. The model is analytic and deterministic, and makes use of a spatial Fourier transform wave approach for periodic structures. The approach is intended for flanking transmission of lightweight building structures, but it is also applicable for structures such as ships and aircraft. Numerical results are presented and discussed. It is concluded that the periodic nature of the wave media affects the power transmitted through a discontinuity.},
  author       = {Brunskog, Jonas},
  issn         = {1861-9959},
  language     = {eng},
  number       = {1},
  pages        = {91--102},
  publisher    = {Hirzel Verlag},
  series       = {Acta Acustica united with Acustica},
  title        = {A wave approach to structural transmission loss in periodic structures: Thin beam case},
  volume       = {91},
  year         = {2005},
}