ANALYSIS OF THE DYNAMICS OF FREIGHT CARS WITH LATERAL DISPLACEMENT OF THE FRONT BOGIE

摘要

The importance of traffic safety issues increases with train speed increase.The question of determining the permissible speeds, which is associated with the assessment of the dynamic qualities of the rolling stock is especially important.A quantitative assessment of dynamic indicators can be obtained by the method of mathematical modeling.The article is devoted to the study of the influence of lateral displacement of gondola car bogies on their main dynamic and interaction indicators between rolling stock and rails.Theoretical study is conducted using the model of spatial vibrations of coupling of five cars in the freight train.During the calculations the change in the rotation angle of the central axle of the car body was considered, which leads to the mutual transverse displacement of the bogies.The rear bogie of the freight car is located along the longitudinal track axle, and the front bogie has a transverse displacement corresponding to the rotation angle of the body along the track axle in the range from 0 to 0.01 radians with a plus sign, which increases the striking angle of the front wheel set on the outer rail.As a result of the research, the dependencies of the dynamic indicators of a freight car on the value of the body rotation angle and the movement speed were obtained.Based on the theoretical calculations, the influence of the lateral displacement of the car’s running gears on the dynamic qualities of the rolling stock and interaction indicators of the rolling stock with the rail track, taking into account the movement speed along a curvilinear track section with irregularities, is assessed.