Study On Contact Force Simulation Of Rigid Suspension Pantograph-Catenary System Based On Finite Element

Subway is an effective way of urban rail transportation to radically improve urban public traffic conditions. It has been applied in several large and medium-sized cities. Due to the installation of low headroom, no disconnection problems, less maintenance, and other unique advantages rigid suspension has been rapid promotion and development in the subway. Electric locomotive access electricity by pantograph sliding contact with the catenary, good quality of the pantograph-catenary current is the basic guarantee stable operation of the train. Contact force is one of the key issues to measure the quality evaluation, when contact force is too large, the contact line and skate wear increases, and shortening the life,and if the force is too small, it will cause offline, or even cause arcing, burning the contact line and skateboard.So we can see that the connect force is very important for the study.In this paper, a finite element models of rigid catenary and pantograph was created,which is based on finite element software ansys, pantograph elastic model can describe characteristics before and after skateboarding, and derive the equations of motion of rigid catenary and pantograph models. By coupling the contact force, solving differential equations of motion pantograph coupled system.Contact the pressure and suspension characteristics of the gateway arch, a variety of factors that change the contact line height, speed and so on, the catenary static characteristics and dynamic characteristics was been first analysisd.Then set "contact pair" between the pantograph and contact wire, establish pantograph coupling model, contact coupling model for nonlinear transient dynamic analysis, curves obtained pantograph dynamic contact pressure. Comparative analysis of simulation data obtained with the measured data, the results validate the reliability of the simulation model.For subway rigid catenary system, rigid transition Pantograph is a part of the stream of weak links, the train passes through the rigid transition section, appear poor flow effect, this paper focuses on the transition section rigid pantograph contact pressures, simulation vibration characteristics of rigid catenary transition section, get rigid catenary flexible transition section, comparison of contact wire uplift at different speeds and uplift forces acting. Respectively pantograph flexible rigid catenary catenary sail area and a flexible rigid catenary catenary sail area to simulate two conditions, obtained curve pantograph dynamic contact pressure, two conditions are present offline phenomenon, when the pantograph flexible rigid catenary catenary sail area, the transition section rigid contact pressure oscillations,and when the pantograph of a rigid catenary catenary flexible sail area,it will appears the phenomenon of the offline. According to the simulation results, if the changing is happened in cross-sectional area of the bus cut trough trends, so that the smallest cross-sectional area smaller buses, improved elasticity changes more evenly, from the simulation results, the change in cross-sectional area can improve the rigid parameters of the transition section by flow effect.