Study On High-speed Railway Operation Safety Mechanism And Related Applications

High-speed railway operation safety is a dynamic, real-time and multi-factor interactive system. The real-time transformation of time and space of the system forms a complicated, dynamic and compound system by combining three simple, basic and static elements together, i.e. people (including train-set locomotive driver, train dispatcher and the person on duty at stations), high-speed train and high-speed line. Any element in the system is not the original one. As the extension of time and space, the imbalance of dynamic operation effect increases the danger of the system, weakens its operability and relaxes its matching ability. In this case, the unbalance of interactions between any two elements will cause high-speed railway operation accidents. Therefore, it is of great theoretical and practical significance to carry out systematic research on problems, like the mechanism of high-speed railway operation accidents, the analysis on the safety reliability of railway ride workers and on the safety of train operation equipments, as well as evaluation on the construction of safety guarantee system and system safety. This dissertation mainly discusses the following four aspects:First, this paper analyzes the cause of high-speed railway operation accidents as well as the coupling and matching between overall operating ability of railway ride workers in the high-speed railway system and system task demand ability, then puts forward several types of danger models, constructs the occurrence mechanism model of high-speed railway operation accidents. On this basis, it also analyzes the diffusion mechanism of high-speed railway operation safety accidents.Second, the article respectively analyzes and models the reliability of dispatchers, people on duty at stations and drivers in the high-speed railway operation system. First of all, analyze the factors which influence the reliability of dispatchers and people on duty at stations by using structure interpretation model, and respectively establish the reliability models of dispatchers and people on duty at stations by using bayesian network model, then establish the reliability models of driver's operation on the basis of analyzing the operation model of the driver, and finally provide a quantitative estimation method based on establishing human factor comprehensive valuation system on driving system.Third, this paper analyzes the principle of train control system in high-speed railway and discusses the determination method on tracking the safe separation distance and time interval at the station. It further establishes the reliability model of the train control system, and carries out research on modeling of problems like the operation fault mode analysis of the train control system in high-speed railway and reliability allocation of the train control system and so on.Fourth, this article makes a macroscopic design on the establishment of operation safety guarantee system and operation safety support information system in high-speed railway. Based on the reality of high-speed system, it puts forward the evaluation index system of operation safety in high-speed railway and provides the system evaluation algorithm.