基于拓扑网络模型的高速列车转向架系统中薄弱部件辨识方法

我国高速铁路的迅速发展对高速列车运营安全保障能力提出了更高的要求。面对日渐复杂的运营环境,对高速列车动力系统中薄弱部件的辨识能够保障高速列车的运营安全。以高速列车转向架物理结构与工作原理为出发点,提出了一种面向高速列车转向架系统中薄弱部件的辨识方法。首先基于复杂网络理论对高速列车转向架系统拓扑结构进行建模;然后利用模糊积分中的Choquet积分,结合节点自身结构计算其可靠性属性,得到薄弱部件最终的辨识结果;最后以CRH2A型动车组转向架系统为例进行分析与验证。结果表明:构架总成、轴箱体、二系垂向减震器等部件是高速列车转向架系统中主要的薄弱部件;由于在高速列车转向架系统中存在不同重要程度的部件,故在日常维护检修过程中应根据薄弱部件辨识结果进行分级维护,在减少维护成本的同时,能够有效提升高速列车安全运营的保障水平。

Weak Component Identification Method for Bogie System of High-speed Train Based on Topological Network Model

The rapid development of China’s high-speed railways puts forward higher requirements on the safety guarantee capability of high-speed train operations.Facing the increasingly complex operating environment,the identification of the weak components of dynamical system of high-speed trains can effectively alleviate this phenomenon.In view of this,this paper takes the physical structure and working principle of high-speed train bogie as the starting point,and proposes a weak component identification method for high-speed train bogie system.Firstly,based on the complex network theory,the paper models the topological structure of the high-speed train bogie system.Secondly,the paper uses the Choquet integral in the fuzzy integral to calculate the reliability attribute of the node itself and obtains the final weak component identification result.Finally,the paper takes the CRH2A EMU bogie system as an example to analyze and verify.The results show that the frame assembly,axle box body,secondary shock absorber and other components are the main weak components in the bogie system.At the same time,there are components of different degrees of importance in the bogie system.In the routine maintenance and overhaul process,hierarchical maintenance should be performed according to the identification results,which will reduce maintenance costs and can effectively improve the guarantee level of safe operation of train at the same time.