铁道标准设计2018，Vol.62Issue(3)：13-18,6.DOI:10.13238/j.issn.1004-2954.201703220004
WJ-8型扣件刚度温变规律及其影响研究
Study on the Variation Rule and Influence of Temperature-dependent Stiffness of WJ-8 Fastener
摘要
Abstract
In order to reveal the influence of temperature on the fastener performance,the WJ-8 fastener is studied as the research object,and the variation laws of stiffness of WJ-8A and WJ-8B fasteners due to temperature changes are analyzed. In addition,through the establishment of wheel/rail dynamics model, the influence of temperature-dependent stiffness of WJ-8A,WJ-8B fasteners on the safety and stability of the train is discussed. The results show that:(1) when the temperature is higher than-20℃,the static stiffness values of WJ-8A and WJ-8B fasteners remain stable; when the temperature is lower than-20℃, the static stiffness of the fasteners increases sharply with the decrease of temperature;(2) in the range of -60~70℃,the wheel load reduction rate increases with the decrease of temperature,but it is always below the safety value of 0.6, which guarantees the traffic safety; (3) in the range of -60 ~70℃,the comfort index of Sperling is stable and the train stability can be guaranteed; (4) wheel load reduction rate and Sperling comfort index increase with the increase of speed,and the higher speed makes the traffic safety and stability worse.关键词
无砟轨道/扣件/温度/行车安全性/行车平稳性Key words
Ballastless track/Fastener/Temperature/Traffic safety/Traffic stability分类
交通工程引用本文复制引用
周昌盛,盛曦,周华龙,王平..WJ-8型扣件刚度温变规律及其影响研究[J].铁道标准设计,2018,62(3):13-18,6.基金项目
国家杰出青年科学基金(51425804) （51425804）
