TY - GEN
T1 - Advanced design of Close-Proximity (CPX) trailer enclosure acoustics for tyre/road noise measurement
AU - Li, Dong Fang
AU - Leung, Randolph Chi Kin
N1 - Funding Information:
The authors gratefully acknowledge the funding support from the Environment Conservation Fund and Woo Wheelock Green Fund under project number 71/2015. Donation of SonexAsia-Plano acoustic panel samples from APAC Building Acoustics Limited, New Territories, Hong Kong for design and construction of PolyU Mark III CPX enclosure is gratefully acknowledged.
Publisher Copyright:
© INTER-NOISE 2021 .All right reserved.
PY - 2021/8
Y1 - 2021/8
N2 - The PolyU Mark II Twin-wheeled CPX trailer was developed for measurement of tyre/road noise in Hong Kong urban environment according to a standard methodology (ISO/CD 11819-2) - the Close-Proximity (CPX) method. Numerical simulations of the acoustics of PolyU Mark II CPX enclosure were conducted and a good agreement between numerical and experimental results were obtained. In order to extend the capacity of the Mark II CPX trailer and enhance the acoustic performance within the enclosure for future tyre/road noise studies, the validated numerical simulations were carried out for the design of the next generation of the PolyU CPX system. Through analyzing the acoustic performance within the enclosures of different dimensions, the geometry of the PolyU Mark III CPX enclosure was finally determined. With newly designed enhanced interior wall absorption, the new PolyU Mark III CPX enclosure design was delivered into numerical simulations for acoustic analysis. Less room modes and high uniformity of SPL distributions were observed within the new enclosure design. The PolyU Mark III CPX enclosure was fabricated based on the corresponding dimensions and the specific absorption layers. Great consistency were achieved between the numerical and measured results of the Mark III CPX enclosure. New PolyU Mark III CPX enclosure shows an improved acoustic performance with a lower background noise level than existing Mark II CPX enclosure. The outcome of this study firmly establishes the feasibility of designing advanced CPX enclosure with numerical simulations with results that can be realized in realistic CPX measurement.
AB - The PolyU Mark II Twin-wheeled CPX trailer was developed for measurement of tyre/road noise in Hong Kong urban environment according to a standard methodology (ISO/CD 11819-2) - the Close-Proximity (CPX) method. Numerical simulations of the acoustics of PolyU Mark II CPX enclosure were conducted and a good agreement between numerical and experimental results were obtained. In order to extend the capacity of the Mark II CPX trailer and enhance the acoustic performance within the enclosure for future tyre/road noise studies, the validated numerical simulations were carried out for the design of the next generation of the PolyU CPX system. Through analyzing the acoustic performance within the enclosures of different dimensions, the geometry of the PolyU Mark III CPX enclosure was finally determined. With newly designed enhanced interior wall absorption, the new PolyU Mark III CPX enclosure design was delivered into numerical simulations for acoustic analysis. Less room modes and high uniformity of SPL distributions were observed within the new enclosure design. The PolyU Mark III CPX enclosure was fabricated based on the corresponding dimensions and the specific absorption layers. Great consistency were achieved between the numerical and measured results of the Mark III CPX enclosure. New PolyU Mark III CPX enclosure shows an improved acoustic performance with a lower background noise level than existing Mark II CPX enclosure. The outcome of this study firmly establishes the feasibility of designing advanced CPX enclosure with numerical simulations with results that can be realized in realistic CPX measurement.
UR - http://www.scopus.com/inward/record.url?scp=85117416769&partnerID=8YFLogxK
U2 - 10.3397/IN-2021-1822
DO - 10.3397/IN-2021-1822
M3 - Conference article published in proceeding or book
AN - SCOPUS:85117416769
T3 - Proceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering
BT - Proceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering
A2 - Dare, Tyler
A2 - Bolton, Stuart
A2 - Davies, Patricia
A2 - Xue, Yutong
A2 - Ebbitt, Gordon
PB - The Institute of Noise Control Engineering of the USA, Inc.
T2 - 50th International Congress and Exposition of Noise Control Engineering, INTER-NOISE 2021
Y2 - 1 August 2021 through 5 August 2021
ER -