Self excited wheel-set axle vibrations can cause discomfort for the passenger, lead to polygonization or lead to issues of the press-fit between wheel and axle. To investigate them closer, measurement data of more than 5000 vibration events were analyzed. This was then used to develop an energy based methodology to calculate the contact energy for each recorded vibration. The energies were then statistically analysed and different percentile energies were calculated. It was possible to use these energies to parametrize a creep force model, e.g., the Polach model, because the energy of one oscillation cycle is directly related to the shape of the adhesion characteristic. The resulting creep curves were then used in a Multi-Body-Dynamics simulation to validate the results, which resulted in a good agreement. Additionally, a realistic worst-case scenario was defined, which can now be used to investigate the influence of changing vehicle parameters on the maximum vibration amplitude during the design phase.
Realistic Worst-Case Adhesion Characteristics Causing Maximum Wheel-Set Axle Vibrations
Lect.Notes Mechanical Engineering
The IAVSD International Symposium on Dynamics of Vehicles on Roads and Tracks ; 2021 August 17, 2021 - August 19, 2021
2022-08-06
9 pages
Article/Chapter (Book)
Electronic Resource
English