| 变化外形的水线对斜拉索风雨激振的激发作用 |
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| 引用本文： | 潘方,顾明. 变化外形的水线对斜拉索风雨激振的激发作用[J]. 力学季刊, 2008, 29(3) |
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| 作者姓名： | 潘方 顾明 |
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| 作者单位： | 同济大学,建筑设计研究院市政分院,上海,200092;同济大学,桥梁工程系,上海,200092 |
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| 基金项目： | 国家自然科学基金，教育部高校骨干教师资助计划 |
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| 摘 要： | 讨论变化外形的水线对斜拉桥拉索风雨激振的激发作用.首先,建立考虑水线外形变化的斜拉桥拉索风雨激振计算模型,并将由采用变化水线外形的模型得到的拉索最大振幅与固定水线外形模型的计算结果及试验实测结果对比,对模型进行验证;在模型得到验证的基础上,进一步讨论拉索和变化水线外形的水线振动稳定性及水线对拉索风雨激振贡献.计算结果表明,在四个典型工况下,考虑水线外形变化的模型得到的拉索计算振幅固定水线外形模型能更好地与试验实测振幅吻合;理论分析发现拉索速度和水线速度的耦合作用对水线运动的激发起到主导作用;水线的加速发散发生在拉索大幅激振之前.没有水线加速发散的时程中,拉索均不发生大幅激振.
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| 关 键 词： | 拉索 斜拉桥 风雨激振 水线外形 |
Rivulet's Shape Influence on Exciting Rain Wind Induced Vibration of Cable |
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| PAN Fang Municipal Branch of the Architectural Design , Research Institute of Tongji University,Shanghai ,China GU Ming. Rivulet's Shape Influence on Exciting Rain Wind Induced Vibration of Cable[J]. Chinese Quarterly Mechanics, 2008, 29(3) |
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| Authors: | PAN Fang Municipal Branch of the Architectural Design & Research Institute of Tongji University Shanghai China GU Ming |
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| Affiliation: | PAN Fang Municipal Branch of the Architectural Design & Research Institute of Tongji University,Shanghai 200092,China GU Ming Department of Bridge Engineering,Tongji University,China |
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| Abstract: | The rain wind induced vibration(RWIV)of cables in cable stayed bridges from two aspects was explored.A new,more reasonable 2DOF RWIV model was established in which the ever-changing shape of rivulet was simulated for rivulet shape contributes greatly to RWIV,and the stability discriminants of the cable and the rivulet motion were deduced.After the new RWIV model was tested by the comparison with wind tunnel test datum,it is investigated that how the increments of cable speed,rivulet position and speed,and t... |
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| Keywords: | cable cable stayed bridge rain-wind induced vibration rivulet shape |
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