| In order to improve the the railway economic and social benefits, improving the speed of trains is the preferred means. The demand of passengers is varied due to the imbalance of regional economic development. High-speed rail for EMU and locomotive traction should coexist. When rigid suspension of driving equipment is used in Co-Co locomotive, the use of speed generally can reach to160km/h; When flexibility suspension of driving equipment is used, maximum use of locomotive speed can reach to200-250km/h; When the speed up to300km/h level, should use the driving equipment semi-body suspension or body suspension.Dynamics software is applied to build a model of semi-body suspension locomotive dynamic model. Locomotive model and wheel-rail contact, and the simulation used in track irregularity lines is described. Stability of the locomotive is analyzed. Linear critical speed and non-linear critical speed are750km/h and400km/h. Riding quality of locomotive under different lines is computed and analyzed. Curve passing capability of locomotive is analyzed under different curve parameters.Relevant parameters’ impact on the locomotive running stability on the straight line is analyzed. By analyzing the impact of the primary and secondary suspension parameters on the locomotive stability, riding quality and curve passing capability to understand the size of different suspension parameters’ impact on the dynamic performance of locomotive. Finally, analysis of the driving equipment’s impact on the dynamic performance of locomotive, to study the impact of different parameters of the driving equipment on the dynamics of various parts of the locomotive. Several factors affected to locomotive lateral and vertical dynamics performance is analyzed, including mass of driving equipment, lateral damper damping of driving equipment and length of motor hanger.The dynamic performance of locomotive is able to meet the standard requirements by studying the dynamic performance of high-speed locomotive, which provides theoretical support and reference for the development of the Co-Co semi-body suspension high-speed locomotive. |
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