Optimal Design of Cab’s Isolation System for a Single-Drum Vibratory Roller

The goal of this paper is to find out the optimal parameters of cab’s isolation system to improve the ride comfort of the vibratory roller. A half-vehicle ride dynamic model of a single drum vibratory roller is established under various operating conditions. The design parameters of cab’s isolation system are optimized by the root mean square (rms) values of acceleration responses of the vertical driver’s seat (a_ws) and cab’s pitch angle angle (a_wcphi) according to the ISO 2631:1997(E) standard. A genetic algorithm (GA) and a multi-objective optimization algorithm are used for searching for the optimal design parameters of cab’s isolation systems. The study results indicate that the a_ws and a_wcphi values with GA optimal parameters reduce by 31.88% and 31.27%, respectively in comparison with the original parameters of cab’s isolation systems when the vehicle moves on the ISO class D road surface at the vehicle speed v = 5 km/h, which shows that the performance of the optimal parameters of cab’s isolation system is better than that of cab’s original isolation system in improving the ride comfort of a single drum vibratory roller at all operating conditions.