Research on the Influence of Loading Frequency on the Dynamic Response of Concrete Sleepers

The load generated during train operation is transmitted to sleepers through rails, and then from trackbeds. As one of the important components track structure, are very service-life safety railways. running speed will produce different frequencies on rails. To explore response under cyclical loads, this research used discrete element method simulate rails sleepers, realizes loading by applying cyclic loads was compression-failure test concrete sample verify reliability parameters model. On basis, sleeper simulated element, change law mechanical such as particle displacement, contact force, stress were analyzed. results show that particles rail had a large vertical maximum displacement force in increased with increasing frequency. trend left right same, both showed periodic changes loading. frequency little effect sleeper. velocity, acceleration amplitude all frequency, thereby between sleeper, dynamic