| 桁段有限元法分析钢桁梁桥振动 |
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| 引用本文： | 杨仕若,曾庆元. 桁段有限元法分析钢桁梁桥振动[J]. 深圳大学学报(理工版), 2011, 28(3): 195-199 |
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| 作者姓名： | 杨仕若 曾庆元 |
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| 作者单位： | 1. 中南林业科技大学土木工程与力学学院,长沙,410004
2. 中南大学土木建筑学院,长沙,410075 |
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| 基金项目： | 国家自然科学基金资助项目，湖南省自然科学基金资助项目 |
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| 摘 要： | 将列车-钢桁梁桥作为整体振动系统,钢桁梁桥采用桁段有限元法离散,列车采用具有23个自由度的二系弹簧车辆空间振动模型,得到系统振动的矩阵方程.以桥上实测蛇形波作为激振源,分别计算了旅客列车以80、100和120 km/h,货物列车以60和80 km/h车速通过某连续梁桥时车桥系统的振动响应,与传统有限元法相比,桁段有限元法能更好地处理钢桁梁桥中的桥门架单元.对某3×64 m连续梁桥的车桥振动进行分析表明,其Sperling指标、脱轨系数和减载率均在安全行车范围内,行车安全有保障,舒适度和车辆平稳性指标均达合格以上.
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| 关 键 词： | 桥梁工程 有限元 振动方程 车桥系统 刚度 舒适度指标 |
Analysis of steel truss girder bridge vibrations by finite truss element method |
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| YANG Shi-ruo,ZENG Qing-yuan. Analysis of steel truss girder bridge vibrations by finite truss element method[J]. Journal of Shenzhen University(Science &engineering), 2011, 28(3): 195-199 |
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| Authors: | YANG Shi-ruo ZENG Qing-yuan |
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| Affiliation: | YANG Shi-ruo1 and ZENG Qing-yuan2 1)College of Civil Engineering and Mechanics Central South University of Forestry and Technology,Changsha 410004 P.R.China2) School of Civil Engineering and Architecture,Central South University Changsha 410075 P.R.China |
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| Abstract: | The train and the continuous truss girder bridge were taken as one composite system.The steel truss bridge was discretized by the finite truss element method,and the train was treated by the two-stage suspension vehicle space dynamic model with 23 degrees of freedom.The measured hunting curves of bogie were taken as excitation,and the vibration responses of train and bridge were calculated when passenger train past through a continuous truss girder bridge at 80 km/h,100 km/h,and 120 km/h,and goods train pas... |
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| Keywords: | bridge engineering finite element vibration equation vehicle-bridge system stiffness sperling value |
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