桥梁抗风罩计算模型与风洞试验的比较

Licheng Zhu, D. McCrum, J. Keenahan
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引用次数: 1

摘要

桥梁气动研究对于确保大跨度桥梁在侧风作用下的安全性和可接受的性能至关重要。空气动力学研究传统上是在风洞设施中进行的,但现在有更多的机会使用计算流体动力学建模。轻型车辆在桥梁上的三维气动模拟研究很少,但迄今为止所做的验证和验证工作有限。在本文报道的研究中,为苏格兰Queensferry Crossing斜拉桥建立了三维计算流体动力学模型,其中包含挡风玻璃和样本车辆。该模型考虑了一系列偏航风角的风效应,从而确定了飞行器的气动系数。通过网格灵敏度研究、区域灵敏度研究以及与风洞试验结果的比较,对模型进行了验证。然后,对不同类型的挡风玻璃使用相同的建模过程来验证模型,并再次将结果与相同配置的风洞试验数据进行比较。结果表明,该模型的气动系数计算精度与风洞试验相当。
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Comparing computational modelling of bridge wind shields to wind tunnel tests
Bridge aerodynamic studies are essential in ensuring the safety and acceptable performance of long-span bridges vulnerable to the effects of crosswinds. Aerodynamic studies were traditionally carried out in wind tunnel facilities, but there are now greater opportunities for using computational fluid dynamics modelling. Few studies of three-dimensional aerodynamic simulations of lightweight vehicles on bridges exist but there has been limited validation and verification work done to date. In the study reported in this paper, three-dimensional computational fluid dynamics models were developed for the Queensferry Crossing cable-stayed bridge in Scotland, containing wind shields and sample vehicles. The models considered the wind effects from a range of yaw wind angles and subsequently determined the aerodynamic coefficients of vehicles. The models were verified by means of a mesh sensitivity study, a domain sensitivity study and comparisons with wind-tunnel test results. The models were then validated by using the same modelling process with a different type of wind shield, and again comparing results with wind-tunnel test data for the same configuration. Results demonstrated that the modelling can determine the aerodynamic coefficients to a similar level of accuracy to that of wind tunnel tests.
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来源期刊
CiteScore
3.00
自引率
10.00%
发文量
48
期刊最新文献
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