Multi-dimension T-S Static And Dynamic Fault Tree And Its Reliability Application In Hydraulic System Of Stacker

Fault tree analysis is an effective method of reliability analysis and evaluation,fault analysis and diagnosis,and it is the crucial technology to guarantee the innovation ability and core competitiveness of equipment.However,with the continuous improvement of mechanical equipment performance requirements,increasing complexity and increasingly complex working environment,the failure probability of mechanical and electrical hydraulic components in the system will be affected by multiple field stresses.The existing fault tree analysis method has certain limitations on the system reliability analysis under the influence of multiple factors.For this reason,the multi-dimensional T-S fault tree and importance analysis method for static and dynamic failure behaviors are proposed;then,the multi-dimensional T-S dynamic fault tree and importance analysis method for static and dynamic failure behaviors are proposed;further,the multi-dimensional T-S dynamic fault tree analysis method considering common cause failure is proposed for the event occurrence correlation of engineering system.Firstly,the conventional fault tree analysis method can not describe any form of static failure behavior,and the failure probability of electro-hydraulic components in the system will be affected by many factors,such as working time,impact times and so on.The multi-dimensional input rule algorithm and multi-dimensional output rule algorithm of subordinate events are given.The feasibility of the proposed method is verified by comparing with the conventional fault tree,space fault tree and T-S fault tree analysis method.Further,in order to solve the problem that the multi-dimensional T-S fault tree analysis method can not describe the dynamic failure behavior of the system,the multi-dimensional T-S dynamic fault tree and importance analysis method are proposed,and the T-S dynamic gate and its continuous time event sequence description rule construction method and description rule algorithm are given.Compared with the space fault tree,Dugan dynamic fault tree and discrete-time T-S dynamic fault tree analysis method,the feasibility of the proposed method is verified.Furthermore,considering the influence of CCF on the system,the CCF model is integrated into the multi-dimensional T-S dynamic fault tree analysis method,and the multi-dimensional T-S dynamic fault tree analysis method considering CCF is proposed.The feasibility of the method is verified by the reliability analysis of the pumping circuit hydraulic system.Finally,through the reliability analysis of the hydraulic system of the bucket wheel stacker,the probability distribution and importance distribution of the system under the influence of working time and impact times,as well as the change curve of the system's failure probability with time under the influence of common cause failure,provide the quantitative information for the improvement and operation and maintenance of the system under the influence of multiple factors and common cause failure.