摘要
该文以12号可动心轨式单开高速道岔为例,在对道岔区相关走行轨线轨顶外形离散基础上,依据其空间布置关系,详细研究了道岔区轮轨接触特点,给出了轮/岔两点接触判定和计算方法,确定了道岔尖轨区和心轨区在现有空间结构下发生多点接触位置,给出了轮轨力在相关轨线上的转移与分配特性,分析了道岔区轮轨接触点在走行轨线上的不连续性和跳跃性,揭示了轮/岔间产生横向和垂向冲击振动机理,这为进一步优化高速道岔各股轨线空间结构奠定了基础。该文的研究结果是目前轮/岔接触几何关系研究方面的重要突破。
Modeled the Chinese No.12 high-speed single way moved nose rail concrete sleeper turnout, the characteristics of the wheel/rail multi-points contact geometry relationship are studied by use of the spatial outline discretion of the rails of the turnout zone. The principle and method to estimate wheel/rails two-point contact are advanced, and the positions of the wheel/rail multi-point contact in the switch area and frog area of this type turnout are located in this paper too. Moreover, the distribution of the wheel/rail forces loaded on the rails and the characteristics of positional discontinuity of the wheel/rail contact point from one rail to another one are also presented. It is shown that it is the positional skip of the contact points on the running rails that causes lateral and vertical furious impact between the wheels and rails in the turnout zone. The proposed method is very helpful to optimize the structure of the high-speed tumout, and to some degree, and the results is useful to study dynamic wheel/rail contact geometry relation of the turnout zone.
出处
《工程力学》
EI
CSCD
北大核心
2008年第11期223-230,共8页
Engineering Mechanics
基金
国家自然科学基金项目(50575020)
关键词
道岔
动态轮轨接触几何关系
两点接触
不连续性
轮轨冲击振动
turnout zone
dynamic wheel/rail contact geometry relation
two-point contact
positional discontinuity
wheel/rail impact
