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The wheel/rail vertical loads are strongly affected by the aerodynamic loads and track excitations, and will further influence the wheel/rail adhesion forces. With the increasing of train speed, the influence of aerodynamic loads becomes more and more significant. In order to probe into this problem, a simplified train dynamic model with three vehicles is established in which each vehicle system has...
The wheel flange climb derailment and wheel impact derailment are studied. Firstly, it is assumed that the wheel flange climb process is quasi-static, then the flange climb derailment criteria are derived through analyzing the forces exerted on the wheelset. One criterion is the classical derailment formula that assumes friction sliding between wheel and rail occurs. Another is the so-called approximate...
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