Dynamic Response of the full-scale Straddle-type Monorail Vehicles with Single-axle Bogies

The research on vibration response on random pavement is conducted to evaluate the riding stability and comfort of a new straddle-type monorail vehicle with single-axle bogies. The topology of straddle-type monorail vehicles with single-axle bogie is analyzed, and the full-scale dynamic model of single-axle bogie straddle-type rail transit vehicles of 34 degree of freedom and the tire-track beam contact model are established. Based on the dynamic model, the random vibration influence characteristics of vehicles of different velocities and tire stiffness are analyzed. Based on the research the riding stability and comfort are reduced with the increase in velocities and tire stiffness. The vertical stability is lower than the horizontal one with the vehicle with the same velocity and mass. This is because that the vertical vibration has a larger amplitude ratio than that of the horizontal vibration. No change is caused on frequency phase with the changes on stiffness. But certain change is made on amplitude. The frequency response is reduced with the increase in stiffness, leading to better stability and riding comfort. DOI: http://dx.doi.org/10.5755/j01.mech.25.1.21931