CLC number: TU112.21
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2020-01-07
Cited: 0
Clicked: 3993
Citations: Bibtex RefMan EndNote GB/T7714
Dan Yao, Jie Zhang, Rui-qian Wang, Xin-biao Xiao. Effects of mounting positions and boundary conditions on the sound transmission loss of panels in a niche[J]. Journal of Zhejiang University Science A, 2020, 21(2): 129-146.
@article{title="Effects of mounting positions and boundary conditions on the sound transmission loss of panels in a niche",
author="Dan Yao, Jie Zhang, Rui-qian Wang, Xin-biao Xiao",
journal="Journal of Zhejiang University Science A",
volume="21",
number="2",
pages="129-146",
year="2020",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1900494"
}
%0 Journal Article
%T Effects of mounting positions and boundary conditions on the sound transmission loss of panels in a niche
%A Dan Yao
%A Jie Zhang
%A Rui-qian Wang
%A Xin-biao Xiao
%J Journal of Zhejiang University SCIENCE A
%V 21
%N 2
%P 129-146
%@ 1673-565X
%D 2020
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1900494
TY - JOUR
T1 - Effects of mounting positions and boundary conditions on the sound transmission loss of panels in a niche
A1 - Dan Yao
A1 - Jie Zhang
A1 - Rui-qian Wang
A1 - Xin-biao Xiao
J0 - Journal of Zhejiang University Science A
VL - 21
IS - 2
SP - 129
EP - 146
%@ 1673-565X
Y1 - 2020
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1900494
Abstract: The sound insulation performance of railway car body structures is critical for the control of rail vehicle interior noise. In sound transmission loss (STL) measurements, a niche with a large depth is necessary to allow for mounting the wide range of thicknesses of railway car body panels and for the mechanical isolation of the two rooms. In this study, two typical interior floor panels are tested in a series of mounting conditions and mechanical boundary conditions. The change of STL results during measurement is also predicted by an STL prediction model based on the finite element method. At lower frequencies, the STL results are influenced by both the mounting positions and the mechanical boundary conditions. At higher frequencies, the STL results are mainly influenced by the mechanical boundary conditions. Differences between the panel in the infinite baffle and niches at the resonance and off-resonance frequencies are different. Considering both the effects of mounting positions and mechanical boundary conditions, the existence of the cavity amplifies the STL difference caused by the mechanical boundary conditions.
The paper discusses the influence of the niche effect (i.e. niche depth and panel placement inside the niche) and the structural boundary conditions on the STL measurement of small-sized panels. The effect is investigated by means of experiments and numerical simulations.
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