Abstract
The aim of this study is to propose an optimal design method for drum’s isolation systems of a double-drum vibrating roller so that the ride comfort can be improved. A half-vehicle ride dynamic model is established based on the drum-ground interactions. The weighted root mean square (rms) of acceleration responses of the vertical and pitch vibrations of the vehicle body (awb and awphi) according to the ISO 2631:1997(E) standard is chosen as objective functions. A genetic algorithm (GA) is applied for searching for the optimal design parameters of drum’s isolation systems based on the objective functions. The study results indicate that the awb and awphi values of GA optimal parameters reduce significantly in comparison with those of the original parameters of drum’s isolation systems, which means that the performance optimization of drum’s isolation systems is better than the original vehicle in improving the vehicle ride comfort.
Highlights
Vibratory roller operates and moves on various kinds of soil ground
A program of genetic algorithm is written in Matlab to declare input parameters such as objective function Eq (8) with w = 0.75, w = 0.25, boundary conditions Eq (9), and GA parameters such as population size as 50 and generation as 200, which called by Simulink module function using the sim function
The results show that a and a values with GA optimal parameters greatly reduce in comparison with the original parameters of drum’s isolation systems, which means that the performance optimization of drum’s isolation systems is better than the original isolation systems of drums in improving the ride comfort
Summary
Vibratory roller operates and moves on various kinds of soil ground. The vibration excitation sources causing vehicle’s body vibration are the excitations of the interaction between drum and deformation ground soil, and the excitations of vibration drum and engine which are one of the main reasons for the driver fatigue and their working efficiency. The design parameters of cab’s passive isolation system of a single drum vibratory roller were surveyed and evaluated its effect on ride comfort using a 3-D nonlinear dynamic model [1]. The riding comfort was evaluated based on a nonlinear dynamics model of a single drum vibratory roller being operated under the different soil grounds [3]. The effect of the design parameters of drum's metal rubber isolation system of the double-drum vibratory roller on ride comfort was analyzed based on a 7-DOFs ride dynamic model [7]. This study presents an optimal design method for drum’s isolation systems of a double-drum vibrating roller to improve the ride comfort considering a 4-DOFs half -vehicle ride dynamic model of a vehicle operating under different conditions. The optimal design parameters of drum’s isolation systems are evaluated and compared to the ones of the original vehicle when the vehicle is operated under different conditions
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