Focusing on the adaptability of ballasted track with trapezoidal sleepers in intercity railway,the dynamic performance index of the track system was tested when the intercity train passed through the curved section with 1 432 m radius of curvature at the speed of 80 km/h-176 km/h,and the dynamic performance of trapezoidal sleeper and ordinary type Ⅲ sleeper was compared.Based on the principle of vehicle-track dynamic interaction and the finite element method,the dynamic analysis model of trapezoidal sleeper ballasted track in curved section was established and the driving safety and comfort of intercity train passing at different speeds were further evaluated.The research results show that:(1)The actual operation safety of the train and the stability of the track structure on trapezoidal sleeper ballasted track in the curved section meet the requirements of the code;(2)Trapezoidal sleeper ballasted track has better vibration damping performance than ordinary type Ⅲ sleeper.When the speed increases from 80 km/h to 176 km/h,its vibration damping effect decreases from 8.3 to 6.2 dB;(3)The analysis of the dynamic interaction between vehicle and track considering the nonlinear characteristics of the lateral resistance of track bed shows that with the increase of speed,the dynamic response of trapezoidal sleeper ballasted track increases,and the safety and comfort of train operation are reduced,but they still meet the requirements of the code.The lateral dynamic response of the vehicle and track is more obviously affected by the speed.
关键词
振动与波/梯形轨枕/有砟轨道/曲线/道床横向阻力/动力性能
Key words
vibration and wave/trapezoidal sleeper/ballast track/curve/lateral resistance of track bed/dynamic performance
维普
万方数据