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The traditional hydraulic steering mode in articulated motor-driven vehicle makes the vehicle structure complex. Further more, the forces between the front and rear part of the articulated vehicle could damage the articulated joint body in the process of vehicle steering. However, skid steering mode could make the vehicle steer with the different speed of each wheel, which is flexible without hydraulic steering system. The purpose of this paper is to introduce the principle of skid steering mode in articulated motor-driven vehicle. In this paper, the theory of traditional wheeled vehicle’s skid-steering mode and hydraulic steering mode of articulated vehicle are used to establish the in-situ skid-steering kinematic and dynamic model. Based on the model, the vehicle trajectory and the dynamic relationships among the body structure of the vehicle, longitudinal forces, lateral forces of each wheel are described.

This paper reports on an investigation of articulated dump trucks vibration analysis and rear suspension stiffness sensitivity analysis. Since the frame of the off-highway dump truck is integrated, the impact from the road surface against the rear wheel is transmitted to the cab directly through the hydro pneumatic suspension and the frame, and finally contributes to the ride comfort. Articulated dump trucks are different from rigid-frame off-highway dump trucks, with the frame divided into two parts and jointed by a hinge, which forms two degrees of freedom between the two parts. Compared with rigid-frame dump trucks, the impact from the road surface against the rear wheel of the articulated truck would not transmit directly to the cab through the frame for the attenuation effect of the hinge. This paper studies the truck mass centre vibration characteristic which shows the resonance frequency of the articulated dump truck.