Wind tunnel tests for aerodynamic interference between streamline type box bridges and rail vehicles under cross wind

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (5) : 95-101.

ZOU Yunfeng1,2,3,HE Xuhui1,2,GUO Xiangrong1,2,HE Wei1,2,HE Jun1,2

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Abstract

Existing studies showed that there is a significant aerodynamic interference between rail vehicles and bridges,however,most existing studies focus on streamline type high-speed rail vehicles and simply supported beam bridges with a blunt body shape,and the influence of bridge on aerodynamic forces of vehicle.Here,the aerodynamic interference between a streamline type box bridge and a rail vehicle with a blunt body shape was studied.The aerodynamic forces of the vehicle and the bridge for different combination cases and wind attack angles were measured in the wind tunnel laboratory of Central South University with a rigid section model force-measuring test,and a test platform was developed to ensure that the aerodynamic forces of the vehicle and the bridge can be measured synchronously.According to test results,the influences of aerodynamic interference between the vehicle and the bridge on the aerodynamic forces of the vehicle,the bridge and the vehicle-bridge system were analyzed.Furthermore,the aerodynamic interference mechanism was revealed according to the flow field visualization results which were obtained with the smoke-wire technique.The results laid a foundation for deriving empirical formulas to calculate the aerodynamic forces of vehicles and bridges considering their dynamic interference,and provided a reference for deeply understanding the aerodynamic interference mechanism between vehicles and bridges.

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cross wind / streamline box bridge / rail vehicle / aerodynamic interference / vehicle-bridge system / wind tunnel test

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ZOU Yunfeng1,2,3,HE Xuhui1,2,GUO Xiangrong1,2,HE Wei1,2,HE Jun1,2. Wind tunnel tests for aerodynamic interference between streamline type box bridges and rail vehicles under cross wind[J]. Journal of Vibration and Shock, 2017, 36(5): 95-101

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