The track car was used to record the shape parameters of the track and the irregularity data of each direction, and these parameters were input into the vehicle dynamics model for calculation and solution. When solving, take full account of the vertical wheel-rail additional force due to vehicle vibration. The author uses a series of simple technical analysis to objectively evaluate how the three-piece bogies and the rails affect each other and analyze the results. The results are consistent with the actual conditions of the rails and the vehicles.
The track irregularity leads to the increase of P2 force, and the P2 force further deforms the track beyond the elastic deformation range. The deformation is never recoverable, which in turn causes the bogie and the vehicle to nod and sink and react to the track if the sleeper The gravel support becomes worse, that is, the orbital coefficient becomes smaller and the vibration of the vehicle will become more and more serious. As the track deteriorates further, vehicle designers cannot change the resonance of the vehicle and the track by improving the design. Then, it will inevitably worsen the deterioration of vehicles and rails.
The relationship between track input and vehicle vibration performance and vehicle maintenance can therefore be optimized for vehicle/track interaction and vehicle maintenance goals. Currently, an optimization analysis of a series of suspension parameters is underway. The best policy and tactical requirements for heavy-haul transportation on wheel-rail contact mainly describe the minimum deformation between the wheel and rail under load, so that the smallest frictional energy loss may occur during operation. At the same time, the relationship between the minimum gauge and the wear of the rim was studied and discussed, trying to avoid harmful wheel-rail defects, maintaining stable vehicle performance, especially safety, and producing minimal noise.
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