This paper proposed a wheel set model which adequately represents the influence of flexibility on the dynamic stability of a high-speed and/or variable gauge vehicle. For the dynamic analysis of a rail vehicle, a flexible axle based on a modal representation was proposed as the point of departure, to which the residual flexibility of the mode shapes not included in the modal representation was added. Due to the fact that problems in the dynamic stability of rail vehicles occur at frequencies lower than 15 Hz and that natural frequencies of the axle body are much higher than that, a model of the wheel set based exclusively on its static flexibility is sufficiently accurate. The structural flexibility of the wheel set considerably influences its dynamic stability: (1) the influence of the symmetric bending mode shapes is negligible, it is the anti-symmetric bending mode shapes that affect the dynamic stability; (2) this influence needs to be taken into account when modelling high-speed trains; (3) it is even more important in variable gauge vehicles. The influence of different parameters on the dynamic stability of the variable gauge bogie has been evaluated and quantified based on the developed model. The most influential factors are the anti-symmetric flexibility of the axle, particularly at low conicity values, and the longitudinal position of the primary suspension yaw centre (SY).
Simple flexible wheelset model for low-frequency instability simulations
2014
13 Seiten, Bilder, Tabellen, 25 Quellen
Aufsatz (Zeitschrift)
Englisch
Simple flexible wheelset model for low-frequency instability simulations
Online Contents | 2014
|Simple flexible wheelset model for low-frequency instability simulations
SAGE Publications | 2014
|