CAJ | 학술논문

针对目前高速铁路接触网系统中吊弦疲劳断裂的问题，为研究当受电弓高速通过时吊弦的振动情况以及疲劳机理，文章首先对武广高速铁路接触网进行动态仿真分析，分析了受电弓以300 km/h通过时，连续2跨吊弦力的分布情况，得到了吊弦最大动态力是吊弦静态力的2～3倍的结论。其次分析了相关标准（欧标EN 50119、日标JIS E 2002及铁标TB/T 2073、TB/T 2074、TB/T 2075）中对吊弦疲劳试验的要求，设计了一套吊弦疲劳试验台。该试验台能够得到不同振动频率、压缩幅度、吊弦力下的吊弦疲劳寿命，为进一步研究吊弦的疲劳特性及疲劳机理提供了试验依据。
침대목전고속철로접촉망계통중조현피로단렬적문제，위연구당수전궁고속통과시조현적진동정황이급피로궤리，문장수선대무엄고속철로접촉망진행동태방진분석，분석료수전궁이300 km/h통과시，련속2과조현력적분포정황，득도료조현최대동태력시조현정태력적2～3배적결론。기차분석료상관표준（구표EN 50119、일표JIS E 2002급철표TB/T 2073、TB/T 2074、TB/T 2075）중대조현피로시험적요구，설계료일투조현피로시험태。해시험태능구득도불동진동빈솔、압축폭도、조현력하적조현피로수명，위진일보연구조현적피로특성급피로궤리제공료시험의거。
At present the droppers fatigue fracture occurs sometimes in high-speed railway catenary system.In order to investigate vibration characteristic and fatigue mechanism of the droppers when the high-speed pantograph passing through the droppers,first this paper has analyzed the dynamic simulation results of Wuhan-Guangzhou line and the force distribution on the dropper of the continuous 2 spans operating at a speed of 350 km/h,and gained the results that the maximum dropper dynamic force is 2~3 times the dropper static force.Second based on the dropper fatigue test re-quirements of the relevant standards (EN50119,JISE2002 and TB/T2073,TB/T2074,TB/T2075),a fatigue test rig has been made for droppers.This test rig can get the fatigue life of droppers under different vibration frequency,com-pressed amplitude and force,which provides a basis for further research of the fatigue property and fatigue mechanism of droppers.