Effect of Track Irregularity Amplitude on Dynamic Performance of Vehicle System under High-speed Operation
By means of the vehicle -track coupled dynamics theory and the corresponding simulation software,the effect of track irregularity amplitude on the dynamic performances of high -speed vehicle system is investigated. The limit amplitudes of track irregularities under high -speed operation are discussed. The analysis results show that the dynamic responses of vehicle system increase gradually with the increase of track irregularity amplitude. The higher the running speed ,the greater the vehicle dynamic response increasing with the increase of track irregularity amplitude. It is found that the controlling index of vehicle dynamic performances under different irregularity excitations is differ -ent, and the corresponding amplitude (half peak) intervals of track irregularity are also different when the controlling index of vehicle dynamic performances reaches its limit value at the speed of 250km/h to 400km/h. The dynamic controlling index of vehicle dynamic performances excited by track vertical profile irregularity in the long wavelength rang is the carbody vertical vibration accel -eration. The controlling indexes of vehicle dynamic performances excited by track alignment irregu -larity and track cross -level irregularity in the long wavelength rang are the derailment coefficient and the carbody lateral vibration acceleration. When the running speed is from 250km/h to 400km/h, the limit amplitude of track vertical profile irregularity in the long wavelength rang is large , it is about 10mm. The limit amplitudes of track alignment irregularity and track cross -level irregularity in the long wavelength rang are about 3.0 ~4.0mm and 3.0～6.0mm (rounded values). The analysis results also show that track gauge irregularity in the long wavelength range has little effect on the dy -namic performance of high-speed vehicle system ,the effect of its amplitude is not obvious.
Jianmin GAO Warnning ZHAI
Train and Track Research Institute , State Key Laboratory of Traction Power,Southwest Jiaotong University , Chengdu 610031, China MOE Key Laboratory of High-speed Railway Engineering ,Southwest Jiaotong University ,Chengdu 610031, China
国际会议
5th International Symposium on Environmental Vibration(第五届环境振动国际研讨会)
成都
英文
667-673
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）