dc.contributor.author |
Zhang, Lei |
|
dc.contributor.author |
Ong, Ghim Ping |
|
dc.contributor.author |
Fwa, Tien Fang |
|
dc.date.accessioned |
2018-09-13T20:07:28Z |
|
dc.date.available |
2018-09-13T20:07:28Z |
|
dc.identifier.uri |
http://dl.lib.mrt.ac.lk/handle/123/13548 |
|
dc.description.abstract |
Porous pavement is often seen as an effective engineering solution to reduce traffic noise. It works by
reducing the horn effect of tire/road noise generation using its acoustic absorbing ability. Sound
energy dissipates when it propagates through the porous surface layer due to the viscous and thermal
effects resulting from the compression and expansion of air within the micro-structure of pore network.
This sound absorption becomes more significant when it comes to horn effect because the multireflection
process makes the absorption occur multiple times in sound propagation. Despite the
significance of horn effect reduction on porous pavement, research studies on this topic are still
limited to date. This paper attempts to investigate the horn effect reduction in a numerical perspective.
A brief description of the acoustic characteristics of porous pavement is presented. Representative
phenomenological and microstructural models which are capable to derive the acoustic impedance of
porous pavement from its volumetric and composition characteristics are introduced. A numerical
horn effect measurement model using boundary element method is then developed and validated
against experimental results. This model is next used to analyze horn effect reduction on porous
pavement. The influence of source position, the directivity of horn effect reduction, as well as the
influence of the thickness and porosity of porous layer are examined. The simulation results
demonstrate the feasibility of BEM model in the analysis of noise propagation on porous pavement
and can provide some in-depth understanding of the horn effect on porous pavement. |
en_US |
dc.language.iso |
en |
en_US |
dc.subject |
Horn effect |
en_US |
dc.subject |
Porous pavement |
en_US |
dc.subject |
Acoustic absorption |
en_US |
dc.subject |
Tire/road noise |
en_US |
dc.subject |
BEM model |
en_US |
dc.title |
Numerical analysis of horn effect reduction on porous pavement |
en_US |
dc.type |
Conference-Full-text |
en_US |
dc.identifier.faculty |
Engineering |
en_US |
dc.identifier.department |
Department of Civil Engineering |
en_US |
dc.identifier.year |
2014 |
en_US |
dc.identifier.conference |
9th Asia Pacific Conference on Transportation & the Environment |
en_US |
dc.identifier.place |
Mount Lavinia |
en_US |
dc.identifier.pgnos |
252-264 |
en_US |
dc.identifier.proceeding |
Proceedings of the Asia Pacific Conference on Transportation & the Environment |
en_US |
dc.identifier.doi |
https://doi.org/10.31705/APTE.2014.23 |
en_US |