TY - JOUR
T1 - Aerodynamic impacts of high-speed trains on city-oriented noise barriers
T2 - A moving model experiment
AU - Liu, Yikang
AU - Yang, Weichao
AU - Deng, E.
AU - Wang, Youwu
AU - He, Xuhui
AU - Huang, Yongming
AU - Chen, Zhengwei
N1 - Funding Information:
This work was funded by the National Natural Science Foundation of China [grant numbers 51978670 and U1934209], Science and Technology Research and Development Program Project of China railway group limited (Major Special Project, 2021-Special-04-2), the National Outstanding Youth Science Fund Project of National Natural Science Foundation of China [grant number 51925808], the Research Grants Council, University Grants Committee of the Hong Kong Special Administrative Region (SAR), China [grant number R-5020-18], the Innovation and Technology Commission of the Hong Kong SAR Government [grant number K-BBY1] and The Hong Kong Polytechnic University's Postdoc Matching Fund Scheme [grant number 1-W21Q].
Publisher Copyright:
© 2023 THE AUTHORS
PY - 2023/4/1
Y1 - 2023/4/1
N2 - Two types of city-oriented noise barriers, i.e., fully-enclosed noise barrier and bilateral inverted L-shaped semi-enclosed noise barrier, have been gradually adopted in city centres along high-speed railways to reduce noise pollution. The aerodynamic impacts of high-speed trains present a threat to the long-term durability of the city-oriented noise barriers. To promote the usage and increase the sustainability of city-oriented noise barriers, a moving-model experiment system with city-oriented noise barriers and HST with a scale ratio of 1:16.8 is established. The train type is CRH380A and the train speed is up to 350 km/h. A systematic comparative study on the aerodynamic performance of the two types of city-oriented noise barriers is conducted. The similarities and differences of transient pressure time–histories, spatial distribution of pressure peaks and spectral characteristics of aerodynamic pressure acting on the two types of noise barriers are compared and discussed. Moreover, the influence of train speed on the characteristics of the train-induced aerodynamic pressure is also investigated. The results show that the pressure fluctuation of the two types of noise barriers is caused by different reasons. Compared with the fully-enclosed noise barrier, the transient pressure of the semi-enclosed noise barrier is more sensitive to train speeds. The research results may provide a reference for the engineering design of city-oriented noise barriers on high-speed railways.
AB - Two types of city-oriented noise barriers, i.e., fully-enclosed noise barrier and bilateral inverted L-shaped semi-enclosed noise barrier, have been gradually adopted in city centres along high-speed railways to reduce noise pollution. The aerodynamic impacts of high-speed trains present a threat to the long-term durability of the city-oriented noise barriers. To promote the usage and increase the sustainability of city-oriented noise barriers, a moving-model experiment system with city-oriented noise barriers and HST with a scale ratio of 1:16.8 is established. The train type is CRH380A and the train speed is up to 350 km/h. A systematic comparative study on the aerodynamic performance of the two types of city-oriented noise barriers is conducted. The similarities and differences of transient pressure time–histories, spatial distribution of pressure peaks and spectral characteristics of aerodynamic pressure acting on the two types of noise barriers are compared and discussed. Moreover, the influence of train speed on the characteristics of the train-induced aerodynamic pressure is also investigated. The results show that the pressure fluctuation of the two types of noise barriers is caused by different reasons. Compared with the fully-enclosed noise barrier, the transient pressure of the semi-enclosed noise barrier is more sensitive to train speeds. The research results may provide a reference for the engineering design of city-oriented noise barriers on high-speed railways.
KW - Aerodynamic impacts
KW - City-oriented noise barriers
KW - Dominant frequency
KW - High-speed trains
KW - Moving model experiment
UR - http://www.scopus.com/inward/record.url?scp=85146994771&partnerID=8YFLogxK
U2 - 10.1016/j.aej.2023.01.041
DO - 10.1016/j.aej.2023.01.041
M3 - Journal article
AN - SCOPUS:85146994771
SN - 1110-0168
VL - 68
SP - 343
EP - 364
JO - Alexandria Engineering Journal
JF - Alexandria Engineering Journal
ER -