A wind tunnel test study on the windproof performance of a new type wind-noise barrier for a rail transit vehicle-bridge system
JIANG Shuo1,2, HE Xuhui1,2, ZOU Yunfeng1,2, CAI Chenzhi1,2, ZHAI Lihua3, NONG Xingzhong3
1. School of Civil Engineering, Central South University, Changsha 410075, China;
2. National Engineering Laboratory for High Speed Railway Construction, Changsha 410075, China;
3. Guangzhou Metro Design & Research Institute Co., Ltd., Guangzhou 510030, China
Abstract：Traditional noise barriers are often designed only considering the effect of noise reduction, but it may transfer too much aerodynamic force to the bridge at the same time. Based on the theory of phononic crystals and Helmholtz resonators, a new type of wind-noise barrier is proposed in this paper. Models of a B-type Metro train and urban rail transit viaduct were manufactured with geometric scale of 1:15. The noise reduction effect is evaluated and the influences of wind-noise barriers on aerodynamic characteristics of train-bridge system were study. Results show that the new type wind-noise barrier has good noise reduction effect in the frequency range of 500 ~ 1600Hz, and the Noise reduction amount can be increased with specific inclination louve rangle. When a new type of wind-noise barrier is set up,the wind-proof effect of the train and the aerodynamic force of the bridge itself are similar to that of a vertical sound barrier, but the wind load of the wind sound barrier can be reduced by up to 9%, which is more conducive to the safety of the bridge and the barrier itself.
蒋硕1,2，何旭辉1,2，邹云峰1,2，蔡陈之1,2，翟利华3，农兴中3. 一种新型风声屏障对城轨车—桥系统防风性能的风洞试验研究[J]. 振动与冲击, 2021, 40(24): 230-235.
JIANG Shuo1,2, HE Xuhui1,2, ZOU Yunfeng1,2, CAI Chenzhi1,2, ZHAI Lihua3, NONG Xingzhong3. A wind tunnel test study on the windproof performance of a new type wind-noise barrier for a rail transit vehicle-bridge system. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(24): 230-235.
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