基于GSN方法的轨道交通车辆制动系统安全论证研究

GSN Method-Based Study on the Safety Demonstration for the Brake System of Rail Transit Rolling Stock

制动系统与乘客人身财产安全密切相关,其发生故障所造成的后果十分严重,因此对制动系统开展安全评估具有重要的现实意义。针对我国地铁传统的安全评估活动中,安全证明文件的种类和数量具有庞大、繁杂、抽象、不易理解和接受的缺陷,明确安全论证的步骤及建模方法,介绍一种通过目标结构标记法(GSN)建立安全证明文件结构的方法,采用图形化语言呈现安全证明文件的逻辑结构,以提高安全评估的效率。针对轨道车辆制动系统的特点及其相关标准,利用GSN方法对轨道交通车辆制动系统的安全论证进行建模,详细阐述该模型的建立过程和注意事项以及建模意义,对我国轨道车辆制动系统的安全评估发展具有实际价值和意义。

Brake system is closely related to personal and property security of passengers, and consequences will be serious if it breaks down. Therefore, it is of practical significance to conduct safety assessment on brake system. Considering that the category and quantity of safety certification documents features hugeness, complexity, abstraction and difficulty for traditional safety assessment in China, the paper confirms the procedure and modeling approach for it and introduces a method that establishes safety certification document structure using Goal Structure Notation（GSN） method which adopts graphical programming language to present logical structure of safety certification document and advances the efficiency of the assessment. Focused on the features of brake system and relative standard, the paper makes a modeling for the safety demonstration of the brake system by means of GSN method and delivers a detailed introduction to the process, cautions and significance of modeling, which provides practical value and significance for the development of safety assessment of Chinese rolling stock brake system.