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浙江大学学报(工学版)  2026, Vol. 60 Issue (5): 945-953    DOI: 10.3785/j.issn.1008-973X.2026.05.004
土木与建筑工程     
钝体钢箱梁气动措施组合的涡振控制效果
魏宇翔(),李加武*(),罗宇昆
长安大学 公路学院,陕西 西安 710064
Suppression of vortex-induced vibration with combined aerodynamic measures for bluff-body steel box girders
Yuxiang WEI(),Jiawu LI*(),Yukun LUO
School of Highway, Chang’an University, Xi’an 710064, China
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摘要:

以直腹板钢箱梁为对象,选取倒L型导流板与上中央稳定板为典型措施,通过风洞试验与CFD数值模拟相结合的方法,分析单一措施与组合措施对涡振性能的影响差异及其流场演化机理. 结果表明:组合措施效果和单一措施效果具有差异性,组合措施效果存在多种可能性. 组合措施的适当高宽比例相比对应单一措施抑振性能更优,尺寸失配会导致扭转涡振恶化. 单一措施组合效果出现多种可能性的原因是组合措施的尺寸比例差异导致的流场差异. 在抑振效果优秀的组合措施中,倒L型导流板通过改变气流分离形态抑制旋涡规模,中央稳定板干扰旋涡演化路径,二者协同作用平衡断面上下表面脉动压力差,显著削弱涡振能量,阻断了涡激共振.

关键词: 直腹板钢箱梁组合措施涡振风洞试验CFD分析流场重构    
Abstract:

Wind tunnel tests and CFD numerical simulations were coupled to study how the single and combined use of two aerodynamic measures—the inverted-L-shaped deflector and the upper central stabilizer—affects the vortex-induced vibration performance and flow field evolution of a vertical-web steel box girder. Results show that the effectiveness of combined measures differs from that of single ones, and multiple performance outcomes are possible for the combined ones. A proper height-to-width ratio for combination measures yields superior vibration suppression relative to single ones, whereas dimensional mismatch exacerbates torsional vortex-induced vibration. The varying effects of combined measures are caused by flow field differences resulting from variations in their dimensional proportions. In high-performance combinations, the vortex scale is suppressed by the inverted-L-shaped deflector through altered airflow separation, while the vortex evolution path is disrupted by the central stabilizer. Their coordinated action balances the fluctuating pressure difference between the upper and lower surfaces of the deck, significantly weakens vortex energy, and ultimately blocks vortex-induced resonance.

Key words: vertical-web steel box girder    combined measures    vortex-induced vibration    wind tunnel test    CFD analysis    flow field restructuring
收稿日期: 2025-06-17 出版日期: 2026-05-06
CLC:  U 441.3  
基金资助: 国家自然科学基金资助项目(51978077).
通讯作者: 李加武     E-mail: 718915376@qq.com;483528387@qq.com
作者简介: 魏宇翔(2000—),男,硕士生,从事桥梁抗风研究. orcid.org/0009-0007-7697-9736. E-mail:718915376@qq.com
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引用本文:

魏宇翔,李加武,罗宇昆. 钝体钢箱梁气动措施组合的涡振控制效果[J]. 浙江大学学报(工学版), 2026, 60(5): 945-953.

Yuxiang WEI,Jiawu LI,Yukun LUO. Suppression of vortex-induced vibration with combined aerodynamic measures for bluff-body steel box girders. Journal of ZheJiang University (Engineering Science), 2026, 60(5): 945-953.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2026.05.004        https://www.zjujournals.com/eng/CN/Y2026/V60/I5/945

图 1  节段模型尺寸
图 2  节段模型的弹簧悬挂体系
图 3  气动措施尺寸示意
振 型阻尼比/%模型频率/Hz参数缩尺比模型值
竖弯0.1851.399m1/60218.317 kg/m
扭转0.1993.398Im1/6040.963 kg$ \cdot $m2/m
表 1  节段模型测振试验设计参数
工况x/mmy/mma/mmx/By/H
0.063B40.613.442.80.060.2
0.067B40.620.145.30.060.3
0.082B54.113.455.70.080.2
0.085B54.120.157.70.080.3
0.102B67.613.468.90.100.2
0.104B67.620.170.50.100.3
表 2  倒L型导流板的工况设置
工况z/mmz/H
0.2H13.40.2
0.4H26.80.4
0.6H40.20.6
表 3  上中央稳定板的工况设置
图 4  不同上中央稳定板工况的涡振响应
图 5  不同倒L型导流板工况的涡振响应
图 6  组合措施对钝体钢箱梁涡振响应的影响
措施类型L型导流板上中央稳定板Nmax/(°)
组合A0.067B0.4H0.02189
单一0.067B0.06720
单一0.4H0.74920
组合B0.102B0.2H0.58970
单一0.102B0.48000
单一0.2H0.74420
表 4  组合措施和对应单一措施的扭转涡振峰值振幅
图 7  临界风速下单一措施对应周期性时刻压力场
图 8  临界风速下单一措施对应周期性时刻流线图
图 9  扭转峰值点临界风速下组合措施对应周期性时刻压力场
图 10  扭转峰值点临界风速下组合措施对应周期性时刻流线图
图 11  压力核心区域示意
图 12  高宽比对涡振流场负压核心区的影响
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