摘要
在软地面上的机动性能是军用高机动性越野车辆的主要性能之一,对于其野外作业有重要的战略意义。为了探究不同类型松软土壤地面路况对越野车辆机动性能的影响,基于离散元法对土壤进行建模,通过土壤堆积角测试试验以及土壤圆锥指数试验进行土壤刚度对标测试。通过DEM-MBD联合仿真方法,利用精确的土壤模型,对不可压缩干燥土壤、不可压缩湿润土壤、可压缩干燥土壤、可压缩湿润土壤4种不同类型土壤进行仿真分析,通过对比越野车辆平均速度、牵引力、驱动扭矩、轮胎沉陷量,探究土壤类型对越野车辆机动性能的影响。越野车在湿润土壤上比在干燥土壤上牵引力减少了6.98%,在不可压缩土壤上的稳定行驶速度比在可压缩土壤上稳定行驶速度高34.2%,在湿润的土壤路面上速度更加稳定。研究成果弥补了国内车辆地面力学领域土壤对整车机动性影响的空白,可为军车野外复杂地形(如沙地、雪地、泥泞等)作战时选择最优的行驶路面,提高作战效率。
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.
作者
肖万港
周云波
傅耀宇
张明
周军
葛纪桃
XIAO Wangang;ZHOU Yunbo;FU Yaoyu;ZHANG Ming;ZHOU Jun;GE Jitao(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China;Unit 63969 of PLA,Nanjing 211113,Jiangsu,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2024年第1期288-298,共11页
Acta Armamentarii
基金
国家自然科学基金项目(51405232)。
关键词
军用越野车辆
土壤圆锥指数
离散元法
多体动力学
牵引力试验
机动性
military off-road vehicle
soil cone index
discrete element method
multibody dynamics
traction test
maneuverability
作者简介
通信作者:周云波,邮箱:15996232137@163.com。
