摘要
为使列车高速通过大跨度铁路钢桁拱桥时具有良好的走行性,同时使桥梁具有良好的动力安全性,对该类桥梁的车-桥耦合振动进行分析。基于车-桥耦合振动理论,采用三角级数法模拟轨道随机不平顺,联立轮对沉浮振动及侧滚振动方程迭代求解轮轨力,采用迭代法求解桥梁及车辆响应。以南京大胜关长江大桥为例,采用推荐方法对该桥在不同列车(德国ICE3动力分散式高速列车、中华之星列车、南京轻轨列车、空载P62货物列车)以不同速度通过时,桥梁和车辆的动力性能进行分析。分析结果表明,该桥安全性和列车安全性、平稳性指标均满足要求,列车平稳性优良,推荐的计算模型及简化方法可用于同类桥梁的车-桥耦合振动分析。
To ensure that the train can have good traveling performance when passes through a long span railway steel truss arch bridge at high speed and also to ensure that the bridge can have good dynamic safety, the train-bridge coupled vibration of the bridge of such type is ana- lyzed. Based on the theory of the train-bridge coupled vibration, the track random irregularity is simulated by the trigonometric series method, the wheel-rail forces are iterated and derived simul- taneously by the equations of the wheel set bouncing vibration and rolling vibration and the bridge and train responses are then derived by the iteration method. By way of example of Dashengguan Changjiang River Bridge in Nanjing, the methods recommended herewith are used to analyze the bridge and train dynamic performance when different types of the trains （e. g. the German ICE3 MUs Train, China Star Train, Nanjing Light Rail Train and Empty Load Freight Train P62） pass through the bridge at different speeds. The results of the analysis demonstrate that the indi- ces of the safety of the bridge, the safety and smoothness of the trains can all satisfy the require- ments, the smoothness of the trains is good and the calculation models and simplified calculation of the recommended methods can be applied to the train-bridge coupled vibration analysis of the bridges of similar type.
出处
《桥梁建设》
EI
CSCD
北大核心
2012年第6期14-19,共6页
Bridge Construction
关键词
钢桁拱桥
车-桥耦合振动
车辆模型
轨道不平顺
轮轨接触
steel truss arch bridge
train-bridge coupled vibration
train model
track irregu- larity
wheel-rail contact
