Wind Tunnel Study on Aerodynamic Characteristics of the Train on Viaducts with a New Type of Wind–Noise Barrier Under Cross Wind

Author:

Jiang Shuo12,Zou Yunfeng12,He Xuhui12,Cai Chenzhi12,Zhai Lihua3,Nong Xingzhong3

Affiliation:

1. School of Civil Engineering, Central South University, Changsha 410075, P. R. China

2. National Engineering Laboratory for High Speed Railway Construction, Changsha 410075, P. R. China

3. Guangzhou Metro Design and Research Institute Co., Ltd, Guangzhou 510030, P. R. China

Abstract

Traditional noise barriers are often designed only by considering its noise reduction effects, but designer ignores that it may transfer too much aerodynamic force to the bridge. In order to meet the wind resistance and noise reduction requirements of the elevated lines crossing an urban area at the same time, a new type of wind–noise barrier (NT-WNB) is proposed. The noise reduction effect is evaluated by a numerical method, and the influence of the wind–noise barriers’ rotation angle on the aerodynamic characteristics of a train–bridge system was studied by sectional model wind tunnel tests. The results show that the NT-WNB has effective noise reduction in the frequency range of 500–1600 Hz, and the noise reduction can be increased when install barriers with upward incline blade. Although an angle combination type of wind–noise barrier can optimize the lateral force and the lift of the train at the same time, which may cause high turbulence in the corresponding area. The NT-WNB can reduce the wind load of the bridge–barrier system by 22%, which is more conducive to the safety of the bridge and the barrier.

Funder

National Key Research and Development Project of China

National Science Foundation of China

Natural Science Foundation of Hunan Province

Program of Hunan Province

Publisher

World Scientific Pub Co Pte Ltd

Subject

Applied Mathematics,Mechanical Engineering,Ocean Engineering,Aerospace Engineering,Building and Construction,Civil and Structural Engineering

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