چكيده به لاتين
The rail transportation system has many advantages over other transportation methods, and for this reason, the general policies of most countries in the world focus on the use and development of rail transportation systems. Chassis is one of the main components in vehicles. The task of the chassis is to keep all the parts of the vehicle together; Therefore, it must have sufficient rigidity against impact, torsion, vibration and other forces. Checking the performance of different parts of the chassis of freight cars can be done based on different static, dynamic and vibration analyzes and based on the test conditions of valid standards; Therefore, by performing the mentioned analysis, it is possible to reach a specific approach to the failure of different parts of the chassis. The aim of the research is to study the parametric factors affecting the stresses and loads on the chassis of the short sided wagon made with three common profiles for the main beam and to obtain the optimal shape of the profile. At first, the three-dimensional modeling of this wagon chassis was done using the Katia software, and then, based on the EN12663 standard guidelines and using Ensys software, loadings were done on the three wagon chassis with I-shaped main beam profile, hat-shaped profile, and Z-shaped profile. In the end, by comparing the examined modes, an optimal mode was presented so that the necessary predictions can be made to prevent the escalation of damages and increase the safety of the rail transportation system as well as its productivity. Also, the interpretation of the results such as the stress ˛ Deflection ˛ reliability coefficient was also discussed. The short edge wagons, whose main beam uses a Z-shaped profile, have the highest load tolerance and optimal shape
