چكيده به لاتين
During the history of the railway industry, the issue of wheel- rail contact has always been a concern for the engineers. The first advancements were made by Dr. Kalker using the computer. Kinematic Reviews about the wear behavior of rolling - slipping contacts of metal on metal occurred in the second half of the twentieth century and several experiments were carried out that identified two of the main factors of wear and creep in metal profiles. The roller contact of wheel and turnout process is very complicated in a dry friction.
Nowadays, the increase in axial load and speed in railway transportation systems has increased the amount of pressure applied to the surface and energy loss, and has caused severe wear of turnout profiles, especially in turnout intersections. One of the major financial and physical losses to the country's railway is the train derailment in the turnout intersections.
As mentioned above, due to the importance of turnout in this study, it has been tried to study the role of damages caused by turnout wear of railway system and explain the necessity for such research in this regard, particularly in Iran, by studying this phenomenon and examining the ruling theories as well as collecting information. In fact, these studies are the starting point for a more precise investigation into this phenomenon.
In the following, the movement of train on a turnout is simulated in the "Universal Mechanism" software and the amount of force applied to the turnout and the wear energy is extracted. Furthermore, the effect of different parameters such as speed, axial load, friction coefficient, arc radius, and turnout profile on the rate of wear will be investigated. Then the turnouts are modeled on CATIA software and the forces extracted from the Universal Mechanism simulation are exerted to the turnout in the FEM software, and the stress, strain and deformation of the turnouts are investigated.
Keywords: turnout, frog, curve, wear, UM, finite elements
