Wheel flat effect on wheel-rail dynamic interaction

8th International Conference on Advanced Concepts in Mechanical Engineering

Spiroiu, M.A.^1 ; Crciun, C.I.^1

Railway Vehicles Department, University Politehnica of Bucharest, Bucharest, Romania^1

关键词: Dynamic forces;    Maximum forces;    Track stiffness;    Vehicle parameters;    Vehicle speed;    Wheel defects;    Wheel rail force;    Wheel-rail interaction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/444/4/042002/pdf
DOI  :  10.1088/1757-899X/444/4/042002

来源: IOP

【 摘 要 】

In the present paper is investigated the influence of wheel flat on wheel-rail dynamic interaction, considering various parameters of the vehicle, track and wheel defect. The analysis shows that wheel-rail dynamic forces have very large magnitudes, even for low speeds. Over a certain speed, the maximum wheel-rail force is increasing with the vehicle speed. In the lower speed domain, it was noticed a maximum, depending on the flat length, corresponding to the natural frequency of the system. It is found that wheel-rail interaction maximum forces are higher for flats with larger ratio a/L. The maximum dynamic forces are also influenced by the track parameters especially by track stiffness while among the vehicle parameters only the wheelset mass have a perceivable influence.