the study on dynamical model of wheel and rail of high-speed train is a focus nowadays. In this paper, the dynamical model of wheel and rail of high-speed train is constructed according to the damping force and the dry friction between wheel and rail. The dynamics of the model was studied and the dynamical system of wheel and rail without collision was analyzed, which povides the theoretical basis for engineering.

The study on dynamical model of wheel and rail of high-speed train has attracted many researchers nowadays. According to the damping force and the dry friction between wheel and rail, the dynamical model of wheel and rail of high-speed train is constructed and the Hamilton dynamical system of this model is analyzed to discuss its nonlinear dynamical behaviors, which will benefit the practical engineering of high-speed train.

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The objective of this study was to investigate the influence of apron and equipment cabin on aerodynamic characteristics of intercity train using numerical simulation. Then aerodynamic force of the train in the open air and crosswind, pressure changes of the train and tunnel were obtained. The results show that the intercity train with apron or equipment can reduces drag, which mainly reduces the pressure differential drag more than 7%. The train with apron has better crosswind stability than with equipment cabin because of the smaller windward area, and obviously it does not better than the original train. And the train with apron also has better performance of passing tunnel than with equipment cabin and the original train.

Snake mobile conveyor is a special structure new conveyor, its body composed of a number of independent frames which relative rotation and achieved conveyor’s horizontal turning. In order to insure smoothness and controllability of turning, system executed predict the feedback control on the steering fuel tank using a hydraulic-assisted steering system. Control programs: the establishment of the virtual prototype of the machine - record tractor turning angle - calculation orbit of tractor frame - to calculate the steering cylinder corresponding stretched time and displacement - the controller to control assisted steering - Complete trajectory , and simulation analysis proved that this control method is feasible.