| 空气绕流诱发H型桥面振动的机理分析与模拟——————以Tacoma大桥风振致毁事故为例 |
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| 引用本文： | 赵庆贤,葛秀坤,邵辉.空气绕流诱发H型桥面振动的机理分析与模拟——————以Tacoma大桥风振致毁事故为例[J].力学与实践,2011,33(6):13-17. |
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| 作者姓名： | 赵庆贤 葛秀坤 邵辉 |
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| 作者单位： | 1. 常州大学环境与安全工程学院;2. 常州大学 环境与安全工程学院; |
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| 基金项目： | 常州科教城院校科研基金项目(K2009304); 2010年常州大学教育教学改革重点课题(常大教[2010]4号)资助 |
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| 摘 要： | 以Tacoma大桥风振致毁事故为例, 研究H型桥面的风振机理. 分析了绕流场对称性的
破缺及其诱发桥面振动的情况; 并根据大桥实际尺寸, 采用Fluent软件进行了二维仿真计算.
结果表明: 桥面低压区从中部逐步形成并顺风向移动, 在上下桥面依次交替进行; 其二, 风
速越大, 桥面所受的阻力和升力变化周期越小, 周期变化速率也越小; 其三, 升力系数的变
化周期约为阻力系数变化周期的两倍, 在当时19m/s的风速条件下, 升力系数变化的周期约
为31.5s.
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| 关 键 词： | Tacoma大桥 对称性破缺 低压区 风振 |
| 收稿时间： | 2011-05-25 |
MECHANISM ANALYSIS AND SIMULATION ON VIBRATION OF H-TYPE BRIDGE DECK INDUCED BY AIR-BAFFLING FLOW |
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| ZHAO Qingxian GE Xiukun SHAO Hui.MECHANISM ANALYSIS AND SIMULATION ON VIBRATION OF H-TYPE BRIDGE DECK INDUCED BY AIR-BAFFLING FLOW[J].Mechanics and Engineering,2011,33(6):13-17. |
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| Authors: | ZHAO Qingxian GE Xiukun SHAO Hui |
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| Institution: | ZHAO Qingxian~(2)) GE Xiukun SHAO Hui (School of Environment and Safety Engineering,Changzhou University,Changzhou,Jiangsu 213164,China) |
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| Abstract: | This paper took Tacoma Narrow Bridge accident caused by wind vibration for an example,researched mechanism of the bridge vibration on the H-type bridge deck and analyzed flow symmetry breaking and conditions of the bridge vibration induced by the flow around.Based on the actual size of bridge deck, two-dimensional numerical calculation was set up by Fluent software.The results showed that the low pressure area was gradually formed from the middle region,moved down wind and changed alternately and periodical... |
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| Keywords: | Tacoma Narrow Bridge symmetry breaking pressure low area wind vibration |
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