| 斜拉桥索梁耦合振动研究 |
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| 引用本文： | 龙俊贤,熊涛. 斜拉桥索梁耦合振动研究[J]. 水运科技信息, 2012, 0(5): 27-31 |
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| 作者姓名： | 龙俊贤 熊涛 |
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| 作者单位： | 中铁二院武汉勘察设计研究院有限责任公司,武汉430071 |
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| 摘 要： | 研究了斜拉桥发生索梁耦合共振的机理与条件,充分考虑了拉索振动的几何非线性、垂度与桥面刚度的影响,建立了索梁耦合振动的数值计算模型。计算结果表明,拉索发生大幅振动与斜拉桥主梁的刚度以及拉索本身的振动特性有关,拉索可能在主梁振动的作用下发生1∶1的主共振或2∶1的主参数共振。根据计算结果讨论了这两种共振的性质,提出了抑制索梁耦合共振的方法。
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| 关 键 词： | 斜拉桥 拉索 主梁 耦合振动 非线性 |
Research on Cable-beam Coupled Resonance of Cable-stayed Bridge |
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| Long Junxian,Xiong Tao. Research on Cable-beam Coupled Resonance of Cable-stayed Bridge[J]. Transportation Science & Technology, 2012, 0(5): 27-31 |
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| Authors: | Long Junxian Xiong Tao |
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| Affiliation: | (Wuhan Survey,Design and Reserch Institute Co.,Ltd.,of CREEC,Wuhan 430071,China) |
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| Abstract: | In this paper the mechanisms and the conditions of cable-beam coupled resonance of cable-stayed bridge were investigated.The numerical computation model of cable-beam coupled resonance in cable-stayed bridge with considerations of geometrical non-linearity,sag of cable and rigidity of deck was created.The computational results indicate that the large resonance in cable is related to the rigidity of girder and the vibration characteristics of cable.The cable may occur as 1∶ 1 main resonance or 2∶ 1 main parameter resonance by the effect of vibration of the girder.We discussed the properties of these two kinds of resonance and proposed the method for restraining cable-beam coupled resonance based on the computational results. |
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| Keywords: | cable-stayed bridge cable girder coupled resonance non-linear |
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