Abstract: Based on LS-DYNA software, the finite element model of third rail current collector passing through third rail ends and rail joint gap under the quasi high speed (160 km/h) is completed, the influences of different speed and structural parameters on the impact vibration response of the collector shoe and third rail are analyzed. The result shows that increasing the damping of the current collector system is the best way to improve the impact response. In order to further explore how the current collector damping influence the normal vibration condition under quasi high speed, a multi-body dynamic model of current collector is established based on MATLAB\Simulink platform. The calculation results shows:by increasing the damping of the current collector system reasonably, the matching performance between collector and third rail can be effectively improved. According to the above research results, an adaptive improvement scheme of the third rail current collector is proposed to meet the requirements of high-speed condition.

Key words: current collector, third rail ends, rail joint gap, collision impact, normal vibration, vertical vibration characteristics, high speed structural improvements