The contact problems between a rigid trolley and a pantograph in a current railway system are studied from the viewpoint of nonlinear dynamics. It is assumed that there are impact oscillations between the contact rigid trolley and the pantograph under the state of contact loss. The rigid trolley pantograph system is modeled with a spring-supported mass excited by an oscillating plate. Using this simple model, the bouncing phenomena between a spring-supported mass and an oscillating plate are examined theoretically and numerically. Moreover, the experiments are conducted with the simple experimental model.
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