关键词: 磁流变, 高速曲线通过, 耦合轮对, 屈服应力, 贝氏体, 滚动接触疲劳, 碳化物, 轴承钢

Abstract: In order to make a good progress to engineering of high-speed railway in vehicle with magneto-rheological fluid (MRF) coupled wheelsets, mathematical model of vehicle system with 31 DOF is established. Simulation shows that the displacement, yaw of wheelsets, wheel/rail lateral force and the lateral acceleration of carbody change greatly when MRF yield stress is less than a certain value and curve radius is less than a certain value, two-point may come into being. The former performance is smaller and vary slowly in the subsequent scope of MRF yield stress. If yield stress is increased, the former performance becomes bigger. Therefore, vehicle with MRF coupled wheelsets possesses better highspeed curve passing dynamic performances when yield stress is in the certain scope.

Key words: Coupled wheelset, Highspeed curving passing, Magneto-rheological fluid (MRF), Yield stress, bainite, bearing steel, carbide, rolling contact fatigue