Enhanced ride comfort of wheel loaders using liquid-filled cab vibration isolation: a full-vehicle nonlinear dynamic model

This study proposes a full-machine nonlinear dynamic (MND) model with a liquid-filled cab vibration isolation (CVI) system to evaluate ride comfort in comparison with a traditional rubber CVI system under large-amplitude and low-frequency excitations. The ride comfort performance of the liquid-filled CVI is analyzed according to ISO 2631 and compared with that of the traditional rubber CVI system. The results indicate that, under the investigated conditions, the root mean square (RMS) values of the vertical accelerations at the driver’s seat and the cab floor center of gravity, as well as the cab’s pitch and roll angular accelerations are reduced by 22.67 %, 22.51 %, 32.06 %, and 9.49 % respectively, when using the liquid-filled CVI. These findings provide a foundation for optimizing the liquid-filled CVI parameters to further enhance ride comfort.