Aerodynamic characteristics study of vehicle-bridge system based on computational fluid dynamics

Wang, Bin; Li, Yongle; Lan, Fangyuan

doi:10.1016/j.jweia.2023.105351

Cited by 5 publications

(1 citation statement)

References 59 publications

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“…Due to the influence of a complex surrounding environment, climate conditions and other factors, crosswinds are frequently generated in the vicinity of highways (McTavish and McAuliffe, 2021; Wang et al , 2023; Wu et al , 2023). When vehicles move at high speeds under the influence of these crosswinds, the airflow around the vehicle becomes asymmetric (Lorite-Díez et al , 2020; Fan et al , 2022).…”

Section: Introductionmentioning

confidence: 99%

The influence of vehicle body roll motion on aerodynamic characteristics under crosswind condition

Taiming,

Ma,

Zhang

et al. 2023

HFF

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Purpose The purpose of this study is investigate the transient aerodynamic characteristics of high-speed vehicle with body roll motion under crosswind condition to improve aerodynamic stability. Design/methodology/approach An overset mesh was used to simulate the rolling motion of the vehicle body. A wind tunnel experiment was conducted to validate the numerical method. Findings The results revealed that the vehicle’s aerodynamic characteristics changed periodically with the body’s periodic motion. In the absence of crosswind, the pressure distribution on the left and right sides of the vehicle body was symmetrical, and the speed streamline flowed to the rear of the vehicle in an orderly manner. The maximum aerodynamic lift observed in the transient simulation was −0.089, which is approximately 0.70 times that of the quasi-static simulation experiment. In addition, the maximum aerodynamic side force observed in the transient simulation was 0.654, which is approximately 1.25 times that of the quasi-static simulation experiment. Originality/value The aerodynamic load varies periodically with the vehicle body’s cyclic motion. However, the extreme values of the aerodynamic load do not occur when the vehicle body is at its highest or lowest position. This phenomenon is primarily attributed to the mutual interference of airflow viscosity and the hysteresis effect in the flow field, leading to the formation of a substantial vortex near the wheel. Consequently, the aerodynamic coefficient at each horizontal position becomes inconsistent during the periodic rolling of the vehicle body.

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Section: Introductionmentioning

confidence: 99%

The influence of vehicle body roll motion on aerodynamic characteristics under crosswind condition

Taiming,

Ma,

Zhang

et al. 2023

HFF

View full text Add to dashboard Cite

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Driving safety analysis of wind–vehicle–bridge system considering aerodynamic interference

Zhang,

Zhu,

2024

Journal of Wind Engineering and Industrial Aerodynamics

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Numerical study on wind-loading characteristics of a high-speed train running over the bridge under tornado-like vortices

He,

Zou

2024

Physics of Fluids

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With global warming intensifying, weather patterns become more volatile and extremes more common. Tornadoes are the most destructive natural disasters causing significant damage to infrastructure. Meanwhile, high-speed railways now face greater risks from tornado events as the national railway network and mass transit trains expand. Thus, studying the tornado flow characteristics and associated effects on high-speed trains is necessary. A study is presented regarding the wind-loading characteristics of a high-speed train running over a railway bridge induced by a tornado belonging to the future railway network. The wind-loading characteristics analyses are performed using the improved delayed detached eddy simulation method. After verifying the numerical approach and mesh strategy, computational studies are conducted to produce a tornado-like vortex and investigate the tornado-induced wind-loading characteristics of a high-speed train running on the bridge by combining a tornado simulation with a moving mesh technique. For the wind-loading parameters studied herein, the selected train's velocity range is between 50 and 350 km/h, the typical operation speed of either regular or high-speed trains. The numerical results show that the time histories of aerodynamic forces on the train revealed a pattern in tornadic flow variability, the time evolutions of the wind loads on the train were affected by train speeds, and the fluctuation was the greatest when the train ran at 50 km/h. Moreover, the train is subjected to larger aerodynamic forces and moments when it operates along with the rotating vortex flow, especially in the core region, and the train is more dangerous when it runs at a lower speed. The results in this study provide references for assessing operation safety, while a train running on the bridge encounters tornadoes.

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Aerodynamic characteristics study of vehicle-bridge system based on computational fluid dynamics

Cited by 5 publications

References 59 publications

The influence of vehicle body roll motion on aerodynamic characteristics under crosswind condition

The influence of vehicle body roll motion on aerodynamic characteristics under crosswind condition

Driving safety analysis of wind–vehicle–bridge system considering aerodynamic interference

Numerical study on wind-loading characteristics of a high-speed train running over the bridge under tornado-like vortices

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