Analysis On Current-Collecting Features Of Rigid Overhead Contact System

Due to the advantages of rigid suspension such as small installation clearance, non-hidden-danger of wire break and low maintenance cost, it has been applying in urban rail traffic and electrified railway more and more extensively. At present, there are tens of urban rail lines in operation or under construction and several electrified railway lines' tunnel parts which are adopting this kind of suspension style in our country. However, study on the current-collecting traits of pantograph-rigid-catenery system is still open to progress. Based on this situation, the author launched an in-depth study to provide a technical reference for the design, construction and development of rigid suspension catenery in domestic.At first, the paper made a detailed derivation for the finite elements model of rigid suspension, carried on static analysis and modal analysis with ANSYS, obtained the inherent frequency and mode, and then studied the influence that the length of cantilever on the inherent frequency and mode of rigid suspension especially. In succession, on the basis of comparison the pros and cons between various pantographs' models at home and abroad, established the vibration equation of rigid suspension according to Euler-Lagrange equation, so as to get out the vibration differential equations set of pantograph-rigid-catenery system. Finally, compiled the numerical simulation procedure of the equations set according to Newmark-βmethod under the precondition of having no cantilever, then analyzed the influences that some technical parameters on current-collecting of pantograph-catenery system such as equivalent rigidity of support mechanism, flexural rigidity of stiffening bar, mass of pantograph head, damp of frame etc., moreover, optimized the pantograph model with two schemes.In the end, the paper deduced the wave motion velocity equation of stiffening bar, and got the stable current-collecting boundary curve of the suspension system, what's more, demonstrated the whole set of theory by practical running using appointed pantograph at different speed on the condition of rigid suspension.