Analysis of over-speed coupling accidents on hump based on fuzzy Petri Net

The over-speed coupling on hump could lead to some serious accidents, such as the damage of cars and the shift of fastening freight, which could affect the security of shunting operation. According to uncertainty and fuzziness of the accidents´ factors, their cause-and-effect relationship is analyzed and fuzzy Petri Net model is established by transferring a fuzzy Fault Tree into a fuzzy Petri Net, which focuses on over-speed coupling on hump. Fuzzy possibility of the top event is obtained. Moreover, the measures of avoiding the over-speed coupling are proposed. The result shows that the accidents´ factors by fuzzy Petri Net are consistent with the practical qualitative analysis.