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《China Mechanical Engineering》 2018-07
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Failure Risk Analysis of EMU Pantograph Systems

QI Jinping;LI Xingyun;Mechatronics T&R Institute,Lanzhou Jiaotong University;Engineering Technology Center for Informatization of Logistics & Transport Equipment;  
Aiming at the actual situations of data losses,multi-source heterogeneity and cognitive uncertainty in the failure risk analysis processes,polymorphic fuzzy Bayesian network was constructed to analyze failure risks of the system using fuzzy fault tree.According to the fuzzy fault probabilities of each root node,the fuzzy possibilities of the intermediate nodes and the leaf nodes were calculated under different fault states.Meanwhile the sensitivity of each nodes was analyzed,and the practical significance was explained.Finally,failure risk analyses of the pantograph systems were carried out according to the above mentioned.The analysis results show that the damages of the net pressure transformer,the fatigue cracks and the duct damages of the control valve plate are high risk events,which are consistent with the actual situations.At the same time,the method also extends the applications of the Bayesian network in practical engineerings.
【Fund】: 铁路总公司科研计划资助项目(2015T002-D);; 甘肃省财政厅资助项目(214153);; 兰州交通大学优秀科研平台(团队)计划资助项目(201604)
【CateGory Index】: U266
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