Study And Simulation Of Railway Safety Guarantee Technology

Safety is the eternal theme of railway transportation. Our country has recently started a large-scale construction of speed-raising of existing railway and the passenger dedicated line. The constant acceleration of high-speed railway especially the development of passenger dedicated line demands higher requirement of railway safety technology. Despite the safety technology has been constantly developing, accidents which made mortifying result in railway continued to happen in the world in recent years. Therefore, safety guarantee technology needs to be more in-depth studied and more efficiency measures of safety guarantee needs to be put forward.With the purpose of further improvement of railway safety, a new thinking of safety guarantee based on the idea of interlock was studied and proposed, and the train control system was designed and simulated in the dissertation. Research is focus on the followings:First, typical cases of railway traffic accidents were investigated and studied, the causes of the accidents were analyzed and classified in detail, and the deficiency of existing safety model and the improved methods were proposed.Second, the restrictive relationship of interlock was analyzed and extended, the restrictive relationship between one part and another of the safety guarantee system was established, and the specific rules of group control were designed. In technical aspect, information sharing between different parts of the system should be enhanced, and in institutional aspect, people in different posts should take more responsibilities of supervision, both to make different parts of the system supervise and restrict each other to achieve the purpose of improve integral safety of safety guarantee system.Third, the restrictive relationship between ground and train, as well as train and train were designed, the safety guarantee train control system was also designed on this basis. Compared with CTCS, the system added the functions of supervision and early-waning on trains speed and location by ground, repeat display of ground information on board, supervision and early-waning on trains speed and location by adjacent trains, which further enhanced train control system's safety guarantee role.Fourth, the supervision and early-warning system of ground-train was simulated, which is a subsystem of safety guarantee train control system System functional requirement was analyzed, system module and solid model were designed. The module function of the track layout drawing, static curve display, train movement display, early-warning of dangerous points, supervision and warning of train speed, communication between train and ground were realized. The functions of the system were verified by simulation of dangerous states for several times, such as trains passing dangerous points, trains overspeeding, trains rashing advance the signal, and so on.