摘要
为研究钢弹簧隔振器断裂对浮置板轨道结构振动特性的影响,通过有限元软件建立车辆-轨道耦合模型,利用有限元模拟方法,研究分析了钢弹簧断裂对轨道结构振动特性的影响规律。研究结果表明,不同数量和不同位置的钢弹簧失效对车体和浮置板振动加速度的影响较小且各种工况下的各个加速度指标皆满足规范要求。钢弹簧失效数量越多,浮置板垂向位移、钢轨垂向位移和钢弹簧支点力就越大。钢弹簧失效数量相等情况下,随着钢弹簧失效位置沿线路纵向距离的增加,浮置板垂向位移幅值就越小。板端钢弹簧失效时钢轨垂向位移比板中钢弹簧失效时的大,而板端钢弹簧失效时的钢弹簧支点力比板中钢弹簧失效时的小。
In order to study the influence of the fracture of steel spring isolator on the vibration characteristics of floating slab track structure,a vehicle-track coupling model was established by finite element software,and the finite element simulation method was used to study and analyze the influence of steel spring fracture on the vibration characteristics of track structure.The research results show that the failure of steel springs in different numbers and positions has little effect on the vibration acceleration of the vehicle body and the floating plate,and the acceleration indicators under various working conditions meet the requirements of the specification.The greater the number of steel spring failures,the greater the vertical displacement of the floating plate,the vertical displacement of the rail and the force of the fulcrum of the steel spring.When the number of failures of the steel springs is equal,with the increase of the longitudinal distance of the failure position of the steel springs along the line,the vertical displacement amplitude of the floating plate is smaller.When the plate-end steel spring fails,the vertical displacement of the rail is larger than that when the plate-end steel spring fails,and the fulcrum force of the steel spring when the plate-end steel spring fails is smaller than that when the plate-end steel spring fails.
作者
王明生
董奇奇
Wang Mingsheng;Dong Qiqi(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)
出处
《石家庄铁道大学学报（自然科学版）》
2022年第4期75-80,共6页
Journal of Shijiazhuang Tiedao University(Natural Science Edition)
基金
河北省自然科学基金(E2020210092)
中国国家铁路集团有限公司科技研究开发课题(P2019G055)。
关键词
浮置板轨道
钢弹簧失效
动力特性
floating slab track
steel spring damage
dynamic characteristics
