铁道标准设计2017，Vol.61Issue(3)：37-42,6.DOI:10.13238/j.issn.1004-2954.2017.03.009
极寒状态下扣件胶垫刚度温变特性及影响研究
Study on Temperature Variant Characteristics and Effects of Rail Pad Stiffness under Extremely Cold Conditions
摘要
Abstract
With reference to Mo-Ka high-speed railway project, an indoor test is conducted on WJ-8 fastener to analysis the change of the rail pad static stiffness subject to temperature decreasing and to identify the temperature variant characteristics of rail pad stiffness. The vehicle-track vertical coupling dynamics model is then established to analyze the impact of rail pad static stiffness on wheel-rail response at the temperature of -48℃ and 20℃ respectively at the speed of 400 km/h. The results show that the static stiffness of the rail pad increases with temperature decreasing, the static stiffness is increased by 51. 1% at -48 ℃ compared with that at 20 ℃; the change of temperature has a small impact on the vehicle running smoothness but a relatively big impact on the vertical vibration acceleration of the wheel set;at low temperature, the vertical wheel-rail force is increased by 8. 19% compared with the force at ambient temperature, while the wheel load reduction rate is increased by 14. 13%. Because the wheel load reduction rate reaches the limit at -48℃, low-temperature-resistant rail pads are recommended in order to ensure the safety of the vehicle.关键词
高速铁路/扣件胶垫/静刚度/动力响应Key words
High-speed railway/Fastener pads/Static stiffness/Dynamic Response分类
交通工程引用本文复制引用
刘子煊,葛辉,王平,张攀..极寒状态下扣件胶垫刚度温变特性及影响研究[J].铁道标准设计,2017,61(3):37-42,6.基金项目
国家自然科学基金高铁联合基金项目(U1234201). （U1234201）
