摘要
建立了87型应急钢梁与轨道交通列车的车桥耦合分析模型,它由车辆模型和有限元桥梁模型两部分组成。对具有2个转向架的4轴拖车和4轴动车分别建立了27、17个自由度的车辆动力分析模型。以轨道不平顺作为车桥耦合系统的自激激励源,运用模态综合技术,建立了车-桥系统耦合振动的运动方程组,通过编程进行计算分析。以三种不同跨度87型下承式钢桁梁为例,模拟运行中列车驶入、驶出桥梁的整个过程,计算分析了钢桁梁的自振频率、振型特点,以及钢桁梁在列车通过时的动力响应规律,得出重要结论,从而为进一步研究87型应急钢桁梁的动力特性提供可行的研究方法。
A spatial analysis model of 87-type emergency steel beam in the train-bridge-coupling system is builtin this paper,which is made up of the train model and the finite element bridge model.Then the dynamic analysis models with 27 degrees of freedom and 17 degrees of freedom are respectively built for the four-axis locomotive and the fouraxis van,both have two bogies.By taking the track irregularity as the self-excited excitation source in the trainbridge-coupling system,the motion equations of the coupling about train and bridge are established,which are calculated through program composition.The steel truss beam of 87-type with three different spansare taken as the example,the whole process of the train running into and out of the bridge is simulated,the self-vibration and the dynamic response characteristicsare analyzed.On this basis,some important conclusions are obtainedthat could provide a possible approach for further research on the dynamic performance of 87-type emergency steel truss beam.
出处
《城市轨道交通研究》
北大核心
2016年第7期51-55,共5页
Urban Mass Transit
关键词
城市轨道交通
应急钢桁梁
车桥系统
动力响应
urban rail transit
emergency steel truss
train-bridge system
dynamic response
