Abstract
The hydro pneumatic isolation (HPI) of the cab combined by the high static stiffness and nonlinear viscous damping of the pneumatic isolation; and nonlinear adjustable damping of the hydraulic isolation are proposed. Based on the simulation and experimental studies, a nonlinear dynamic model of the soil compactor interacting with the deformable terrains is built to analyze the low frequency ride comfort of the HPI. The HPI’s performance for improving the ride comfort and health of the driver is evaluated via both the power-spectral-density and root-mean-square of acceleration responses of the driver’s seat heave, pitching and rolling cab angles. The research results show that the HPI’s characteristics with high static stiffness and nonlinear damping have an obvious impact on reducing low frequency vibration and controlling the cab shake of the vehicle in comparison with the traditional rubber mounts.
Highlights
The soil compactor is a kind of equipment for road-building, and it belongs to the category of road equipment in construction machinery
The above research did not consider the influence of ground deformation, the results showed that the hybrid hydro pneumatic suspension (HPS) could effectively improve vehicle ride comfort, which provided the direction and idea for the research in this study
The ISO 2631-1 showed that the driver’s health was seriously affected by the vertical vibration at a range of 4-10 Hz and rotational vibration of 0.5-2 Hz. Both the maximum PSD and RMS values of the driver’s seat heave, pitching and rolling cab angles are chosen as the indexes to evaluate the ride comfort performance of the hydro pneumatic isolation (HPI) in comparison with the traditional rubber isolation (TRI)
Summary
The soil compactor is a kind of equipment for road-building, and it belongs to the category of road equipment in construction machinery. In order to improve the vibration isolation performance of the TRI and enhance the ride comfort of the vehicle, Kordestani A. studied the influence characteristics of rubber vibration isolator parameters [1], and Nguyen V. The pneumatic isolation (PI) equipping the suspension systems of the cars, passenger vehicles, commercial vehicles, and high speed trains [15, 16] were applied to cab isolation systems to improve the ride quality and health of the driver in the low frequency range [17, 18]. A nonlinear dynamic model of the vehicle under the interaction of the wheels-elastoplastic soil at the frequency 35 Hz of the drum is built to analyze the HPI’s performance for improving the driver’s ride comfort and health. The HPI’s low frequency ride comfort is evaluated via both the power-spectral-density (PSD) and root-mean-square (RMS) of acceleration responses of the driver’s seat heave, pitching and rolling cab angles in both the numerical simulation domains of the frequency and time
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