Abstract
The steering performance of off-road tires on sandy soil has a great influence on the maneuverability of the vehicle, which has long been studied by scholars. However, the discrete element method (DEM) modeling of tire steering on sand is still lacking. In this paper, an off-road tire steering model on sandy soil is established by using the discrete element method, and the parameters of the sandy soil model are calibrated based on the triaxial compression test and inclined plate experiment. Then, the parameters of the sandy soil model are verified by the reduced-scale single wheel soil bin test under a straight-driving condition. Finally, the influence of the steering radius, roll angle, roll angle, and slip rate on the tire steering process is studied. The results show that a reduction in the steering radius has a slight influence on the drawbar pull and driving torque but a greater influence on the growth of the lateral force, the aligning torque, and the reduction in sinkage. The slip rate and sideslip angle play an important role in drawbar pull, drive torque, lateral force, and torque. The roll angle has a small influence on the drawbar pull and driving torque but a greater influence on the lateral force and the aligning torque.
Highlights
In military, agriculture, and transportation, the driving performance of tire steering has a great influence on the maneuverability of the vehicle
This paper provides the specific process and steps of analyzing tire steering using the discrete element method, including the selection of particle parameters, the calibration test method of simulation parameters, the verification method of the discrete element model, and the introduction and application of the multi-body dynamics (MBD)-DEM coupling method, as well as the mechanical parameters that should be analyzed and paid attention to in the tire steering performance
A systematic parameter calibration method was proposed based on the triaxial compression test and inclined plate test, and the soil DEM model was verified under the straight-driving condition
Summary
Agriculture, and transportation, the driving performance of tire steering has a great influence on the maneuverability of the vehicle. The physical properties of sandy soil, such as density, moisture content, and particle diameter, were measured by laboratory tests Based on these parameters, a sand model for tire steering with a particle size of 5 mm and particle number of more than 700 000 was established. This paper provides the specific process and steps of analyzing tire steering using the discrete element method, including the selection of particle parameters, the calibration test method of simulation parameters, the verification method of the discrete element model, and the introduction and application of the multi-body dynamics (MBD)-DEM coupling method, as well as the mechanical parameters that should be analyzed and paid attention to in the tire steering performance.
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