摘要
指出了国内外在列车—桥梁时变系统空间振动计算中存在的不足,并提出了改进办法。诠释了桥上列车走行安全性的含义。基于桥上列车脱轨力学机理,提出了桥上列车走行安全性、舒适性及平稳性的计算原理。阐述了系统运动稳定性的判别准则。根据列车脱轨能量随机分析理论及列车—桥梁时变系统空间振动计算模型,对京通线烟囱沟桥上列车走行安全性、舒适性及平稳性进行了计算,并对其计算结果进行了分析。由于该桥跨中横向水平振幅达到8.465mm,晃动较大,文中最后还对该桥提出了限速建议值。
Limitations in the spatial vibration calculation of train-bridge time-varying systems are pointed out, and an impproved method is proposed. The meaning of safety of trains running on a bridge is annotated . On the basis of the mechanical mechanism of train derailment, the calculation principle for the safety, comfort and smoothness analyses of trains running on a railway bridge is put forward. The criterion for evaluating the dynamic stability of the system is expounded. According to the theory of random energy analysis of train derailment and the calculation model of spatial vibration of train-bridge time-variant system, safety, comfort and smoothness calculation and analysis of trains running on the Yanconggou bridge in the Jingtong Railway Line are conducted. Owing to the rather large lateral amplitude as high as 8.465mm, the bridge swing is significant; the limit speed value for this bridge is provided.
出处
《土木工程学报》
EI
CSCD
北大核心
2005年第7期65-70,共6页
China Civil Engineering Journal
基金
国家自然科学基金项目(50078006)
铁道部科技研究开发计划项目(2001G0292003G043)
教育部高等学校博士点科研基金项目(20010533004)
关键词
桥梁
列车
脱轨力学机理
系统运动稳定性
判别准则:安全性
舒适性
平稳性
限速值
bridge
train
mechanical mechanism of derailment
dynamic stability of system
evaluation criterion
safety
comfort
smoothness
limited speed value
