TY - GEN
T1 - Analytical and numerical investigations of sound radiation from traffic tunnels
AU - Yang, Weiping
AU - Choy, Yatsze
N1 - Funding Information:
The authors would like to acknowledge the funding from The Hong Kong Polytechnic University (PolyU152029/17E) and (PolyU152666/16E). The first author would also like to thank the studentship of The Hong Kong Polytechnic University.
Funding Information:
The authors would like to acknowledge the funding from The Hong Kong University (PolyU152029/17E) and (PolyU152666/16E). The first author would thank the studentship of The Hong Kong Polytechnic University.
Publisher Copyright:
© Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020. All rights reserved.
PY - 2020/8/23
Y1 - 2020/8/23
N2 - An analytical model is established based on the Wiener-Hopf (W-H) technique in conjunction with the mode-matching method to predict the noise radiated from traffic tunnels. Multiple point sources with different locations and volume velocity strengths are applied to simulate the sound produced by vehicles. In the first place, the sound field inside a tunnel is expressed in terms of normal modes while the radiated sound field outside the tunnel is converted from the natural domain to the spectral domain through the Fourier transform. Subsequently, a scalar modified Wiener-Hopf equation (MWHE) of the second kind is obtained and solved following the standard decomposition and factorization procedures. After that, the unknown coefficients are determined adopting the continuity relations of pressure and particle velocity at the opening and the far-field directivity patterns of the radiated sound field are then attained via the inverse Fourier transform which contains a complex integral that can be evaluated by the saddle point method approximately. Finally, the model is validated by the finite element method (FEM), and the formation mechanisms of the radiated sound fields are investigated, which will be useful for the proposal of appropriate noise control approaches.
AB - An analytical model is established based on the Wiener-Hopf (W-H) technique in conjunction with the mode-matching method to predict the noise radiated from traffic tunnels. Multiple point sources with different locations and volume velocity strengths are applied to simulate the sound produced by vehicles. In the first place, the sound field inside a tunnel is expressed in terms of normal modes while the radiated sound field outside the tunnel is converted from the natural domain to the spectral domain through the Fourier transform. Subsequently, a scalar modified Wiener-Hopf equation (MWHE) of the second kind is obtained and solved following the standard decomposition and factorization procedures. After that, the unknown coefficients are determined adopting the continuity relations of pressure and particle velocity at the opening and the far-field directivity patterns of the radiated sound field are then attained via the inverse Fourier transform which contains a complex integral that can be evaluated by the saddle point method approximately. Finally, the model is validated by the finite element method (FEM), and the formation mechanisms of the radiated sound fields are investigated, which will be useful for the proposal of appropriate noise control approaches.
UR - http://www.scopus.com/inward/record.url?scp=85101365724&partnerID=8YFLogxK
M3 - Conference article published in proceeding or book
AN - SCOPUS:85101365724
T3 - Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020
SP - 3817
EP - 3827
BT - Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020
A2 - Jeon, Jin Yong
PB - Korean Society of Noise and Vibration Engineering
T2 - 49th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2020
Y2 - 23 August 2020 through 26 August 2020
ER -