Operation safety assessment of high-speed train with fuzzy group decision making method and empirical research

High-speed train plays a great significant role in the safe operation of high-speed railway. To ensure the safety and reliability of high-speed train, it is necessary to study the operation safety assessment of high-speed train. Based on its complex integrated mechatronic structure, a multiplex network model is made to study the reliability of high-speed train system and some characters of the model are obtained to establish the operation safety assessment index system associated with people, environment, infrastructure and inherent risk of high-speed train. Considering the uncertainty in the process of operation safety assessment, a new decision model combining intuitionistic fuzzy set and VIKOR method is proposed and applied to the CRH2 high-speed train bogie system operation safety assessment, and Frame Assembly comes the highest risk. The result shows the feasibility and applicability of the method and can provide important technical support for decision-makers.

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