This paper conducts a detailed investigation into the formation mechanism of wheel polygonalization in high-speed trains and its influence factors through numerical simulation. A finite element model including two rails, one wheelset, and three disc brake units is set up to study the formation mechanism of wheel polygonalization in high-speed trains based on the point of view of frictional self-excited vibration. Using the finite element complex analysis, the dynamic stability of the wheelset–track–disc brake system is studied. In addition, the influence factors on the wheel polygonalization are investigated. Results show that when the longitudinal creep force is unsaturated, the 21-order polygonal wear of wheels occurs easily due to the self-excited vibration of the disc brake unit. When the longitudinal creep force is saturated, the 12-order polygonal wear of wheels probably occurs due to the self-excited vibration of the disc brake unit. The bigger the friction coefficient between the brake disc and pad, the greater the occurrence propensity of the polygonal wear of wheels. Vertical fastener damping that is too large or too small is disadvantageous for suppressing wheel corrugation. However, increasing the lateral fastener damping is beneficial for reducing the polygonal wear of wheels. When the vertical fastener stiffness is 25 MN/m, 7-order, 9-order, and 14-order wheel polygonalization can easily occur. A higher lateral fastener stiffness is beneficial for the suppression of wheel polygonalization.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Effect of the unstable vibration of the disc brake system of high-speed trains on wheel polygonalization


    Contributors:
    Wu, BW (author) / Qiao, QF (author) / Chen, GX (author) / Lv, JZ (author) / Zhu, Q (author) / Zhao, XN (author) / Ouyang, H (author)


    Publication date :

    2020-01-01


    Size :

    16 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Aerodynamic Noise Reduction of Brake Disc for High-Speed Trains

    Shiraishi, N. / Wakabayashi, Y. / Kurita, T. et al. | Springer Verlag | 2018


    Aerodynamic Noise Reduction of Brake Disc for High-Speed Trains

    Shiraishi, N. / Wakabayashi, Y. / Kurita, T. et al. | British Library Conference Proceedings | 2018


    BRAKE SYSTEM FOR HIGH SPEED TRAINS

    CHO HAE YONG | European Patent Office | 2016

    Free access

    Brake System for High Speed Trains

    LEE YONG JUN / PARK YONG KI | European Patent Office | 2019

    Free access