Research On C₀-C₀250Km/h Locomotive Dynamics

To fully improve the benefits of railway operation, increasing speed of locomotive is a particular course. The speed of high-speed locomotive designed by our own country is about200km/h, which put forwards thoughts on developing and producing of high-speed locomotive with a speed of250km/h. However, the lateral dynamic performance of200km/h locomotive needs further improvement. For the Co-Co250km/h locomotive, all the dynamic performances of the high-speed locomotive should be optimized. When flexibility suspension of driving equipment is used and under optimum suspension parameter, the dynamic performances of the high-speed locomotive can be improved to a great extent. In addition, the impact from the line should be paid attention to when the locomotive moves under this high speed.SIMPACK was applied to build a model of driving equipment flexibility suspension dynamic locomotive. Model of the Co-Co locomotive, its wheel-rail contact and motional differential equation, and the irregularities of the track in the simulation were illustrated. This paper in the third chapter linear simulation analysis has been done under three interference lines, and in the paper last two chapters the simulation analysis has been done under German high-speed high interference line.Stability of locomotive was analyzed with two criteria:linear critical speed and non-linear critical speed. Riding quality of locomotive under different lines was computed and analyzed. Curve passing capability of locomotive was analyzed and contrasted under fixed curve parameters.Systematic analysis of impacts on primary suspension and secondary suspension locomotive was had presented, including stability, riding quality, curve passing capability and had known sensitivity of locomotive dynamic performance. Furthermore, impact of Co-Co locomotive suspension parameter on locomotive dynamic performance was comprehensively understood.In the end, effects of different driving equipment parameters on dynamic performance of locomotive have been analyzed and sensitivity of various components in locomotive to driving equipment parameters has been studied. Several factors affected to locomotive stability, lateral and vertical dynamic performance have been analyzed, including mass of driving equipment, length of motor hanger and damper damping of motor. Study of dynamic performance of250km/h locomotive has shown that this locomotive can meet the basic requirement when running at a speed of250km/h, which will provide some theoretical supports for developing C0-C0high-speed locomotive.