VERTICAL DYNAMIC EVALUATION OF THREE-WHEELED ROAD VEHICLES

Abstract

The effect of vehicle vibration response on human comfort and safety is of current importance in ride quality studies. By aid of a mathematical model of the vehicle, it would be feasible to examine it's overall response to a given input or disturbance. The overall ride quality of a vehicle is affected by it's vertical, lateral and longitudinal vibration modes. In particular, the vertical vibration mode is of greater importance in the . cases of vehicle travelling over roads having varying degrees of roughness. In this dissertation work, a 6 degrees of freedom mathematical model of VIKRAM-410 three-wheeled road vehicle have been taken up for investigating the vertical dynamic behaviour. The equations of motion, are developed using Newton's second law of motion and are solved numerically on digital computer. The accelerations and displacements of sprung mass and unsprung masses are presented for the vehicle travelling. at 40 kmph speed. The maximum vertical accelerations are also presented in the vehicle speed range of 10-80 kmph