Research On 200km/h AC Rigid Catenary Scheme

The initial design of overhead conductor rail(OCR)was used for low-speed driving of metro vehicles at a speed of not more than 80 km/h.However,with the development of science and technology and the demand of transportation market,OCR is not only applied to urban rail transit,but also to trunk railway tunnels.Moreover,OCR has made great progress in speed-up.OCR used in the extra-long tunnels of several main railway lines in China runs at 160 km/h,and the new Beijing airport line with the highest speed of 160 km/h is about to be opened to traffic.The Sichuan-Tibet railway with the highest speed of 200 km/h is in the early stage of construction.Under this background,the design of 200 km/h AC overhead conductor rail system is carried out.In this dissertation,based on the finite element method,A coupled simulation model between pantographs and OCR was established.The simulation method has passed the verification of reference model in EN50318.The effectiveness of the pantograph-catenary coupling model is verified by the measured data of Guangzhou Metro Line 3.The prototype of 200 km/h Pantograph-Rigid catenary system is preliminarily established,and the full speed grade analysis was carried out to compare the dynamic performance of different pantographcatenary models.On the basis of pantograph-catenary system prototype,only the span is changed,and the optimal span value suitable for pantograph 200 km/h operation is selected through analysis,and the pantograph-catenary system prototype is determined by combining with full speed grade analysis.The fractured anchor segment joint and the inflatable joints was introduced,and focuses on the establishment of simulation model of inflatable joints;The influence of the stiffness at support structure on dynamic performance of the pantograph catenary system is analyzed from two aspects: the stiffness change of all support structure and the stiffness change of part support structure.The optimal stiffness values of support structure under two types of anchor joints are determined,and the pantograph-catenary system scheme of 200 km/h is preliminarily established;By analyzing the actual measured contact line height data,the probability distribution of contact line height is confirmed.Static geometric deviation data of location points with corresponding probability distribution generated by MATLAB.Comparative analysis of pantograph-catenary dynamic performance of different pantographcatenary system schemes under different working conditions is carried out.The reason of uneven wear of sliding plate is analyzed from the angle of pull-out value arrangement of rigid catenary.A new layout scheme of pull-out values for rigid catenary with different types of anchor joints is proposed,under the new layout of pull-out value,the wear uniformity of pantograph slide plate has been greatly improved.Finally,based on the above analysis,a 200 km/h AC rigid catenary scheme is formed.