Abstract
The wheels of power and trailer wheelset show different polygonal characteristics since their structures are obviously different. Therefore, the frictional self-excited vibration models of wheelset-track systems are established based on the viewpoint of the frictional self-excited vibration in reducing the wheel polygonal wear. Then, the motion stability of wheelset-track systems is studied by using the complex eigenvalue method. The results show that when the creep force between the wheel and rail is saturated, the unstable vibration frequency of the power wheelset is prone to induce 19-20th-order polygonal wear of the wheel, and the trailer wheelset is prone to induce 20-21th-order polygonal wear of the wheel. Meanwhile, the wheel polygonal wear can be effectively alleviated through changing the gearbox position of the power wheelset. And avoiding disc braking at high speeds can suppress the occurrence of wheel polygonal wear. In addition, the development tendency of wheel polygonal wear can be reduced by increasing the Young’s modulus of the brake pad, but Poisson’s ratio has little effect on the development tendency.
Highlights
With the rapid development of high-speed lines, high-speed train technology has acquired great progress, which can ensure safe operation and good riding comfort
Foreign scholars in Germany and Sweden have studied the problem of wheel polygonal wear earlier. ey have conducted systematic research on the formation, development, and dynamics of wheel polygonal wear through a large number of field tests and numerical simulation analysis
Luo et al [8] established the model of the wheel-rail system and carried out numerical analysis. en, they found that the polygonal wear of the wheel was caused by the original irregularity of the wheel tread. ey insisted that the polygonal wear of the wheel with initial irregularity would increase with the increase of running distance
Summary
With the rapid development of high-speed lines, high-speed train technology has acquired great progress, which can ensure safe operation and good riding comfort. Meywerk [6] proved that the phase angle difference of polygons would affect the development speed of the wheel polygons by combining wheel-rail vibration and wheel tread wear. Meinke and Meinke [7] and his colleagues established a singledegree-of-freedom wheelset dynamics model and analyzed the formation and development of wheel polygonal wear by using unbalanced calculation and wear simulation. Ma et al [10] established a linear motor metro vehicle model and analyzed it with the dynamic software to prove that the main excitation frequency and running speed of wheel-rail contact force have an important influence on the development of the wheel polygonal wear. E wheel-rail saturated creep force causes the frictional self-excited vibration of the wheelset-track system, which leads to the wear of the wheel polygon. Corresponding measures to suppress the wheel polygonal wear are proposed
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