چكيده به لاتين
Abstract:
the motion stability of railway rolling stock considerably is depending to the forces between the rail and wheel. these forces are the factors of defects in rail and wheel and derailment is occurred with increasing of these forces.
also with measuring these forces, we can detect the failure of rail and rolling stock vehicles, so obtaining the information of these force is most important, with access to this ability it is possible to forecast the derailment with ratio of lateral and vertical forces, determine the corrosion and fatigue and also determine the allowable speed of load moving in track is possible on the other hand the direct measuring of these forces is complex and expensive, so the recent method(indirect measuring) is used to measure of these forces. usually the factors such as accessibility, repairing and maintenance and constant condition monitoring of contact forces is most important parameters to measuring methods.
immediately determining of wheel flat with sensors installed is decreased damages which is imposed to locomotive and rail. results obtaining form soft wares can utilized as the first results in wheel flat determining devices.
analytical software can reduces the cost of test and can utilize as the first steps of tests, for this purpose one freight car with 18-100 bogie and GT26-CW locomotive are modeled and the effects of parameters such as primary and secondary suspension, mass and stiffness and damping of substructures, length and kind of flat and train speed on the vertical contact forces between the wheel and rail is studied.
Keywords: wheel flat, um software, condition monitoring, dynamic analysis, 18-100 bogie, GT26-CW locomotive
