Analysis of the Influence of Soil on the Maneuverability of Military Off-road Vehicles

doi:10.12382/bgxb.2022.0528

Abstract

Abstract:

Maneuverability on soft ground is one of the main performances of military high-mobility off-road vehicle, and has important strategic significance for its field operations. In order to explore the influence of different soft soil surface conditions on the maneuverability of off-road vehicles, the soil is modeled based on the discrete element method, and the soil stiffness calibration test is carried out through the soil accumulation angle test and soil conical index test. Through the DEM-MBD co-simulation method, the accurate soil model is used to simulate and analyze four different types of soil: incompressible dry soil, incompressible wet soil, compressible dry soil, and compressible wet soil. The influence of soil type on the maneuverability of off-road vehicles is analyzed by comparing the average speed, traction force, driving torque and tire subsidenceof off-road vehicles.The traction ofoff-road vehicle on wet soils is 6.98% less than on dry soils, and its stable travel speed on incompressible soils is 34.2% higher than that on compressible soils, and its speed is more stable on wet soil roads. The research makes up for the gap in the influence of soil on the mobility of the whole vehicle in the field of ground mechanics of domestic vehicles, and can choose the optimal driving road surface for military vehicles in the field of complex terrain,such as sand, snow, mud, etc.,to improve combat efficiency.

Key words: military off-road vehicle, soil cone index, discrete element method, multibody dynamics, traction test, maneuverability

CLC Number:

E923

XIAO Wangang, ZHOU Yunbo, FU Yaoyu, ZHANG Ming, ZHOU Jun, GE Jitao. Analysis of the Influence of Soil on the Maneuverability of Military Off-road Vehicles[J]. Acta Armamentarii, 2024, 45(1): 288-298.

Figures/Tables 22

References 21

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本征参数	数值
密度/(kg·m^-3)	2600
泊松比	0.25
杨氏模量/Pa	2.5×10⁷

本征参数	数值
密度/(kg·m^-3)	2600
泊松比	0.25
杨氏模量/Pa	2.5×10⁷

土壤粒子间	数值
碰撞恢复系数	0.50
静摩擦系数	0.48
动摩擦系数	0.20
土壤粒子与接触部件	数值
碰撞恢复系数	0.50
静摩擦系数	0.32
动摩擦系数	0.21

土壤粒子间	数值
碰撞恢复系数	0.50
静摩擦系数	0.48
动摩擦系数	0.20
土壤粒子与接触部件	数值
碰撞恢复系数	0.50
静摩擦系数	0.32
动摩擦系数	0.21

参数	数值
滚动半径/mm	522
外周长/mm	3279.82
宽度/mm	335
花纹高度/mm	12
滚动速度/(r·min^-1)	10