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The present state of knowledge on the handling behavior of truck-dolly-trailer systems is based on parametric studies made through simulation of eigne value analysis. Any convincing study using the equations to the stability boundaries have not been reported so far due to algebraic complexities. A detailed planar mathematical model for various design configurations of the tractor triaxle trailer combination, the tractor quadaxle trailer combination and the doglogger truck is developed. Furthermore, a kinematic and dynamic analysis of log hauling combination trucks, incorporating a sliding drawbar is carried out and the governing equations for planar yaw motions are derived. Using the computer simulation model, the directional performance and yaw stability of articulated vehicles are studied through the transient and harmonic response analysis. Finally, a parameter sensitivity study is carried out for different variables involved in the computer simulation model.

Usually, vehicles driven under different road conditions are subjected to various forces and moments. An uneven input force originating from road surface could be one of the major load affecting ride comfort or body vibration. In order to investigate the ride and handling characteristics of a tandem axle truck, a three dimensional mathematical model is developed, and the equations of motion for the proposed model with fourteen degrees-of-freedom are derived. Various numerical techniques are used to solve this complex matrix equation. A computer program, capable of vibration isolation and dynamic analysis of tandem-axle truck, is presented. The sensitivity analysis for the parameter variation of the simulation model is investigated and the overall effects of anti-roll bar is also examined.

In this study a detailed mathematical model for various design configurations of tractor-pole trailer combinations, incorporating a sliding drawbar, is developed. Furthermore, a kinematic and dynamic analysis for this vehicle combination is carried out and a computer simulation model is developed. Some results for kinematic performance and parameter variations of pole trailer-truck combinations are also presented. Additional results for dynamic and stability analysis are obtained through a transient and harmonic response analysis, and a parametric sensitivity study is carried out.