The Simulation Research On Failure Of Catenary On ANSY

With the rapid development of electrified railway,people have put forward higher requirements on the safety and running speed of electrified railway.However,in the actual operation of the electrified railway,the failures of the catenary system frequently occur,which affects the normal flow of the overhead network,and thus leads to the failure of the electrified railway to operate normally.Based on this,it is necessary for us to make in-depth analysis of the bow network receiving flow quality in case of failure,so as to accurately determine the contact network fault point,facilitate personnel to predict and maintain the contact network fault,and lay a foundation for the safe operation of the catenary system.At present,domestic and foreign scholars mainly study the fault state mechanism and phenomenon of the contact network,rarely quantitative analysis of the bow network receiving flow quality.In this paper,a fault model of the overhead network is constructed based on ANSYS,and various factors affecting the flow quality of the overhead network are explained one by one by combining with the contact force analysis.At the end of the paper,some measures are put forward to improve the quality of the bow network receiving flow.Based on the actual situation,this paper briefly analyzes the common contact network fault state.based on simulation research,the rigid catenary,catenary suspension catenary,rigid flexible and anchor-segment joint transition model is constructed,and the pantograph sliding along the contact line is realized based on the contact pair coupling method.Combined with the flexible contact network model,the fault of each contact suspension is simulated and analyzed.Through the research,it is found that the closer the fault is to mid-span,the worse the current mass is.It is found that there is no flow around the fault point.It is found that the larger the tension of the cable and the tension of the contact line within the appropriate range is,the better the flow quality of the bow network will be.Combined with the rigid suspended overhead contact network model,the relationship between the following factors and the bow network receiving flow is simulated and analyzed:first,the collapse of the bus joint,second,the positioning insulator is loose,and third,the installation deviation of anchor joint and rigid flexible transition section.It is found that the more serious the collapse of the middle joint of the bus-bar,the worse the flow quality of the bow network and the off-line phenomenon.The lower the suspension stiffness,the better the bow network flow quality.However,if the positioning insulator is loose and the suspension stiffness is very small,the bow network will deteriorate sharply.The joints of rigid and flexible transition and anchor segments are the weakest links in the whole contact network system.In order to improve the flow quality of the bow network,a scheme is proposed to install the elastic positioning clip.It is found that the installation of elastic suspension in different ways will have different effects on the flow quality of the bow network.It is generally believed that the elastic positioning clip is adopted for the whole circuit,and the corresponding bow network receives better flow quality.The elastic positioning line clip can be used in rigid and soft transition,and the joint of anchor segment can significantly improve the suspension point elasticity and optimize the bow net receiving flow quality.In addition,it can significantly reduce the sensitivity of the bow net to rigid transition and deviation of the anchor joint.