铁道标准设计2017，Vol.61Issue(8)：5-9,5.DOI:10.13238/j.issn.1004-2954.2017.08.002
Vossloh300扣件胶垫刚度温变性的测试与分析
Testing and Analysis of Vossloh300 Fastener Pad Stiffness and Temperature Changes
摘要
Abstract
This article takes vossloh300 fastener pad as the research object and measures the fastener pad static stiffness values in the temperature range of -60 ~20 ℃ by using the universal testing machine equipped with temperature box. On the basis of the above experiment, multi-body dynamics software is used to establish a vehicle-rail coupling model to explore the effect of temperature-dependent stiffness of rail pads on dynamic characteristics of the high-speed train. Experimental results show that vossloh300 fastener pad has good temperature stability in the temperature range of-40 ~20 ℃, and the fastener pad static stiffness at -40 ℃ is 26. 91 kN/mm, only 20. 4% more than the value at 20 ℃(22. 40 kN/mm); when the temperature is lower than -40 ℃, the fastener pad stiffness grows sharply with the temperature declining. Simulation analysis indicates that temperature-dependent stiffness has little influence on derailment coefficient, but has a significant impact on wheel unloading rate:the maximum wheel unloading rate at-48℃ is 0. 585 , which is 24. 73% more than the value at 20℃. It can be seen that the wheel unloading rate becomes one of the main factors effecting traffic safety as the ambient temperature continues to drop.关键词
铁路轨道/扣件胶垫/温变实验/静刚度/多刚体动力学Key words
Railway track/Fastener pads/Temperature change experiment/Static stiffness/Multi-body dynamics分类
交通工程引用本文复制引用
杨麒陆,王平..Vossloh300扣件胶垫刚度温变性的测试与分析[J].铁道标准设计,2017,61(8):5-9,5.基金项目
国家杰出青年科学基金项目(51425804) （51425804）
