An Intelligent Railway Safety Risk Assessment Support System forRailway Operation and Maintenance Analysis

摘要

The paper presents the development of an intelligent railway safety risk assessment based support system. Theproposed method can evaluate qualitative and quantitative safety risk data and information in a uniform manner forrailway safety risk assessment. It permits the safety risk analysts to assess the risks associated with the failure modesdirectly using linguistic terms, i.e. qualitative descriptors. The proposed intelligent railway safety risk assessment systemis capable of assessing the risks at component level, sub-system level and system level. It can assess not only “hard” risks(e.g. risks of a system), but also “soft” risks (e.g. staff risks). The outcomes of safety risk assessment are represented intwo formats, risk score and risk category with a belief of percentage, which provide very useful safety risk information torailway designers, operators, engineers and maintainers for risk response decision making. An illustrative example of staffrisk assessment in a railway depot is used to demonstrate the proposed intelligent railway safety risk assessment system.The results indicate that by using the proposed system, risks associated with a railway depot can be assessed effectivelyand efficiently.