| 基于桥梁基准有限元模型的列车-桥梁空间耦合振动分析 |
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| 引用本文： | 肖祥,任伟新.基于桥梁基准有限元模型的列车-桥梁空间耦合振动分析[J].中国铁道科学,2011,32(2). |
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| 作者姓名： | 肖祥 任伟新 |
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| 作者单位： | 中南大学,土木建筑学院,湖南,长沙,410075;中南大学,高速铁路建造技术国家工程实验室,湖南,长沙,410075 |
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| 基金项目： | 国家“八六三”计划项目(2009AA11Z101) |
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| 摘 要： | 以武汉天兴州公铁两用大桥为研究背景,基于大桥通车前环境振动试验得到的模态识别参数对依据设计图纸建立的桥梁初始有限元模型进行修正,建立反映桥梁真实动力行为的基准有限元模型。基于该基准有限元模型,建立大桥列车—桥梁空间耦合振动方程,采用模态综合法,进行单线行车、双线并行和双线对开工况下的列车—桥梁空间耦合振动分析,并对车辆运行的舒适性和安全性进行评估。结果表明,在上述各工况下,列车通过该桥时,车辆的各项动力学性能指标值均满足规范规定要求,列车行驶的安全性和平稳性均较好;桥梁中跨跨中最大横向位移为1.52 cm,最大竖向位移为10.5 cm,相应的竖向、横向挠跨比分别为1/4 800和1/33 158,均满足铁路桥梁检定规范要求,说明该桥具有足够的横向和竖向刚度。
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| 关 键 词： | 桥梁 基准有限元模型 环境振动 车桥耦合 模态分析 |
Train-Bridge Spatial Coupling Vibration Analysis Based on the Baseline Finite Element Model of the Bridge |
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| XIAO Xiang,REN Weixin.Train-Bridge Spatial Coupling Vibration Analysis Based on the Baseline Finite Element Model of the Bridge[J].China Railway Science,2011,32(2). |
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| Authors: | XIAO Xiang REN Weixin |
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| Institution: | XIAO Xiang1,2,REN Weixin1,2(1.School of Civil Engineering and Architecture,Central South University,Changsha Hunan410075,China,2.High-Speed Railway Construction Technology National Engineering Laboratory,China) |
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| Abstract: | At the background of Wuhan Tianxingzhou highway-railway combined bridge,the initial finite element model based on its design drawings was updated by real modal identification parameters of the bridge obtained via the ambient vibration testing before its opening,then a baseline finite element model reflecting the real dynamic characteristics of the bridge was acquired.The train-bridge spatial coupling vibration equation was established based on this baseline finite element model.The spatial coupling vibratio... |
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| Keywords: | Bridge Baseline finite element model Ambient vibration Vehicle-bridge interaction Modal analysis |
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