| 阻尼对行车荷载下大跨桥梁振动的影响 |
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| 引用本文： | 赵发章,王解军. 阻尼对行车荷载下大跨桥梁振动的影响[J]. 冰川冻土, 2004, 26(4): 461-465. DOI: 10.7522/j.issn.1000-0240.2004.0075 |
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| 作者姓名： | 赵发章 王解军 |
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| 作者单位： | 1. 甘肃省交通厅, 工程处, 甘肃, 兰州, 730030;2. 湖南大学, 土木工程学院, 湖南, 长沙, 410082 |
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| 摘 要： | 基于车桥相互作用,建立了车桥耦合单元,一个车辆模拟为4轴10个自由度模型,桥梁模拟为梁单元,推导出列车桥梁整体系统运动方程的有限元计算公式.采用随机数值模拟方法和功率谱密度函数生成随机轨道粗糙度.编制了计算程序,考虑各种不同的阻尼参数及车辆速度,对一座实际大跨斜拉桥的动力反应与冲击效应进行了分析研究.
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| 关 键 词： | 振动 车桥相互作用 阻尼 冲击效应 有限单元法 斜拉桥 |
| 文章编号： | 1000-0240(2004)04-0461-05 |
| 收稿时间： | 2003-12-07 |
| 修稿时间： | 2003-12-07 |
Effects of Damping on Vibration of Long Span Bridge under Moving Vehicles |
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| ZHAO Fa-zhang,WANG Jie-jun. Effects of Damping on Vibration of Long Span Bridge under Moving Vehicles[J]. Journal of Glaciology and Geocryology, 2004, 26(4): 461-465. DOI: 10.7522/j.issn.1000-0240.2004.0075 |
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| Authors: | ZHAO Fa-zhang WANG Jie-jun |
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| Affiliation: | 1. Engineering Division of Gansu Provincial Communications Department, Lanzhou Gansu 730030, China;2. College of Civil Engineering, Hunan University, Changsha Hunan 410082, China |
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| Abstract: | An element of vehicle-bridge coupling is established based on train-bridge interaction. A vehicle of train is modeled as an element possessing 4 axles and 10 degrees of freedom. Bridge is modeled as beam elements. Finite element formulas are educed from the equations of motion for whole train-bridge system. The random rail roughness samples are yielded using random numerical method and power spectral density function. Based on present method, a computing program is developed. As an example, the dynamic response and impact factors of a cable-stayed bridge are analysis with various damping parameters and various train speeds. |
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| Keywords: | vibration train-bridge interaction damping impact effect finite element method cable-stayed bridge |
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