Improvement of methods for calculating the interaction of propellers of multi-axle wheeled vehicles with barrier obstacles

The paper presents theoretical and experimental studies of overcoming by multi-axis machines of barrier destructible obstacles. The review showed that the existing calculation apparatus is based on the assumption that barrier obstacles are not deformable, i.e. the walls of the obstacle have sufficient strength. It happens rare on the ground. One of the most difficult cases of off-road traffic is the overcoming of the multi-axle wheeled vehicle of the destroyed moat, as the walls of the ditch collapse as the wheels of the machine pass, which leads to its broadening. Deficiencies of the existing settlement apparatus were identified, and subsequently it was refined and supplemented. To verify the results obtained, experimental studies were carried out. As a research object, a small class all-terrain vehicle with a gross mass of 700 kg was chosen. Tests were conducted on the bank of the Volga River in the vicinity of the city of Nizhny Novgorod. As support bases, sand (homogeneous soil) and a compacted ground surface with a sod layer (heterogeneous soil) were chosen. According to the newly obtained dependencies, the theoretically possible maximum width of the moat being overcome, given its destructibility, was determined. Also on the selected support bases, their physical and mechanical properties were studied, using the PG-1 ground penetrometer and the research complex for accelerated studies of the properties of cohesive and disconnected soils “Litvinov Field Laboratory PLL-9”. In the future, dependencies characterizing the influence of various design parameters of transport-technological machines on the maximum width of the moat being overcome were obtained in the work, taking into account the destructibility of its walls.

multi-axle wheeled vehicles, collapsible barrier obstacles, moat