Because the position of every grid, the artificial boundaries and the interpolation cells for boundary points are changed from one time step to next time step, it is necessary to use snaking-like method in the moving Chimera grid technique to improve the efficiency of building artificial boundaries and searching interpolation cells for boundary points.

Chaotic behavior of jumping rail over hunting for high-speed vehicle;

According to the limit circling curve of vehicle hunting,nonlinear critical speed is obtained by use of multi-body dynamics software,which takes into account the lateral track irregularity and nonlinear contact element,and the lateral velocity of wheelset is acquired during the derailment process of vehicle.

The hunting stability and the bifurcation problems at superhigh speed of the passenger coach system were analyzed.

Train snake movement is the major reason for suspension derailment.

Influence of hunting motion on ride quality of railway vehicle;

The bifurcated graph of hunting motion of wheelsets is obtained through calculation.

Computer simulation of hunting motions of Chinese conventional empty freight car on tangent track is carried out.

We establish the model of a driver-vehicle 2DOF closed-loop system and then simulate the vehicle′s snaking test.