Three-dimensional CAD modeling and running stability
analysis of railway vehicles are often completed separately;
therefore, the CAD design information has not been inherited
by the continued dynamic analysis [1]. In fact, there exit an
intrinsic mapping relationship between the three-dimensional
CAD model and the dynamic model of railway vehicles,
which is embodied in the consistence of the physical and
geometric characteristic of vehicle parts and the location
topology of each part. Consequently, if taking full advantage
of this kind of intrinsic mapping relationship, we can not
only ensure the precision of dynamic parameters, but also
improve the dynamic modeling efficiency for running
stability analysis of railway vehicles. Based on this
viewpoint, a new solution is proposed in this paper: by
applying secondary development technique of CAD software,
the running stability analysis of railway vehicles is integrated
in CAD environment to achieve a seamless link between
CAD modeling and running stability analysis process.