基于主动吸气控制的双幅钢箱梁涡激振动数值模拟研究

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摘要为提高双幅钢箱梁涡激振动性能，以某三跨钢箱连续梁桥为研究背景，提出了基于主动吸气控制的双幅钢箱梁涡激振动抑制措施。采用计算流体动力学方法研究了主动吸气控制措施对双幅钢箱梁涡激振动的抑制效果。结合Fluent用户自定义函数(UDF)和“动网格”技术，计算了双幅钢箱梁的涡激振动响应。通过对比风洞试验和数值模拟计算结果，验证了数值模拟方法的可靠性。从能量输入机制、流场等角度分析了主动吸气控制措施的抑振机理。研究结果表明：主动吸气控制措施能有效抑制双幅钢箱梁的涡激振动。吸气源的布置及吸气气流速率的大小均会影响对涡激振动的控制效果。吸气气流与回流相互作用，从而有效地抑制了桥梁的涡激振动。

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	董国朝1
	曾梦竹1
	韩艳1
	许育升1
	吴肖波2
	罗楚钰3

关键词 ：双幅钢箱梁, 涡激振动, 主动吸气控制, 数值模拟, 能量输入机制

Abstract：In order to improve the vortex-induced vibration (VIV) performance of double steel box girder, a novel VIV suppression method based on active suction flow control was proposed for a three-span continuous steel box girder bridge. The VIV suppression effect of active suction flow control on double steel box girder is studied by using computational fluid dynamics (CFD) method. The VIV response of double steel box girder was calculated by combining User Defined Functions (UDF) of Fluent and "dynamic grid" technology. The reliability of the numerical simulation method was verified by comparing the wind tunnel test results with the numerical simulation results. The vibration suppression mechanism of the active suction flow control was analyzed from the perspectives of energy input mechanism and flow field. The results show that active suction flow control can effectively suppress VIV of double steel box girder. The arrangement of suction slits and the suction rate can affect the effect of VIV suppression. The VIV of the bridge is effectively suppressed by the interaction between the suction flow and the reflux flow.

Key words： double steel box girder vortex-induced vibration (VIV) active suction flow control numerical simulation energy input mechanism

收稿日期: 2022-07-23 出版日期: 2023-10-15

引用本文:

董国朝1，曾梦竹1，韩艳1，许育升1，吴肖波2，罗楚钰3. 基于主动吸气控制的双幅钢箱梁涡激振动数值模拟研究[J]. 振动与冲击, 2023, 42(19): 221-230.
DONG Guochao1, ZENG Mengzhu1, HAN Yan1, XU Yusheng1, WU Xiaobo2, LUO Chuyu3. Numerical simulation of VIV of double-steel box girder based on active suction control. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(19): 221-230.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I19/221

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