Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 18, 2020 - November 20, 2020
In order to ensure a stability and safety of trains running on turnouts, gaps between a tongue rail and a stock rail should be as small as possible by a fixing force of a switching equipment. To check indirectly condition of the fixing force, an opening force at the toe of the turnout, which is proportional to the fixing force, is usually measured during periodical maintenance works of the switching equipment. However, the proportionality of the forces is known to be affected by some parameters such as the type of turnout, the friction between the tongue rails and the bed plates, and closure distance between the tongue rail and the stock rail. In this paper, the effect of rail closure distance against opening force is analyzed using a 2-D beam model of tongue rails which allows for calculation of bending displacement and forces. The results of analysis confirm that the proportional coefficient of the opening force to the fixing force is affected by a gap closure on an end side of a switch rod.
