摘要
运用弹性系统动力学总势能不变值原理及形成矩阵的"对号入座"法则,建立列车—板式无砟轨道—路基的竖向振动方程组,用Matlab编制相应计算程序,并用ANSYS软件验证,分析在随机不平顺激扰下,列车高速运行时板式无砟轨道不同纵向连接形式对列车—板式无砟轨道—路基系统振动特性的影响。研究表明:板式无砟轨道纵向连接形式对车体垂向加速度、钢轨垂向加速度、轮轨垂向力、扣件压力的影响极小,但对板式无砟轨道各部件及路基受力有较大影响,轨道板与底座纵连,可以大大降低轨道板和底座的振动和动应力,无砟轨道动力特性总体较为优良。
The vertical vibration equations of train-slab ballastless track-subgrade system were formulated by using the principle of total potential energy with stationary value in elastic system dynamics and the ＂set-in-right-position＂ rule for formulating matrixes. The corresponding program was developed with the Matlab language, and was verified by the calculation result of Ansys software. With the program, the influence of different longitudinal link modes of the slab ballastless track on the vertical vibration characteristics of train-slab ballastless track-subgrade system under random irregularity excitation at high running speed was studied. The calculated results show that the longitudinal link mode of slab ballastless track has little effect on vehicle vertical acceleration, rail vertical acceleration, wheel/rail vertical force and fastening pressure force, but has significant influence on the mechanical force of each part of slab ballastless track / and the subgrade. The vertical connection of track slab and the concrete base can significantly decrease the vibration and the dynamic stress of the slab and the concrete base. The dynamic characteristics of the ballastless track are excellent as a whole.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2010年第1期32-37,共6页
China Railway Science
基金
中国博士后基金资助项目(20070410769)
关键词
板式无砟轨道
路基
车辆
耦合
振动特性
Slab ballastless track
Subgrade
Vehicle
Coupling
Vibration characteristics
