沙漠履带式运输车通过性仿真与试验

Chassis Trafficability Simulation and Experiment of Desert Crawler Transport Vehicle

为提高沙漠地区车辆运输车能力,通过对沙漠土壤参数和履带车辆在松软地面通过性理论的分析,设计一种配备三角履带板的LY352J型沙漠履带式运输车。该车能够进行人员物资运输、车辆牵引、绞盘牵引作业,主要由三角履带板、绞盘和驾驶室等关键部位组成。通过理论分析和计算,确定各关键部件参数及沙漠履带式运输车在沙漠松软地面下的牵引通过性,应用Creo软件建立该履带车辆的虚拟样机模型,并采用RecurDyn(Recursive Dynamic)动力学仿真软件对车辆履带的最佳张紧力选择、直行、爬坡、转弯进行模拟仿真。结果显示,车重45%的条件下履带最佳张紧力为26.46 kN,能够保证车辆运行平稳且各项性能良好;上坡仿真得到的最大坡度为30°;转向动力学仿真中,车辆在路面上的转向稳定性较优,但在转弯时车辆容易失稳,会出现横向倾斜。最后在试验场地对试验样机进行直行、纵向爬坡和转向试验,验证该车型在沙漠地形实际行走时具有良好通过性能,能够克服轮式运输车在沙地沉陷的弊端,可满足现阶段沙漠地形运输作业的需求。

In order to improve vehicle′s trafficability in the desert,based on the analysis of the desert soil parameters and the theory of traficability of crawler vehicles on soft ground,a LY352J desert crawler transport vehicle equipped with triangular track shoes was developed.This vehicle can carry out personnel and material transportation,vehicle traction,and winch tration operations,mainly composed of key parts such as triangular track shoes,winch and cab.Through theoretical analysis and calculation,the parameters of each key component andh traction traficability of desert crawler transport vehicle on soft desert ground were determined.Creo software was used to build a virtual prototype,and RecurDyn(Recursive Dynamic)dynamic simulation software was used to simulate the optimal tension selection,straight driving,climbing,and turning of vehicle crawler.The results showed that,under the condition of 45%vehicle weight,the optimal tension of the track was 26.46 kN;under the condition of 26.46 kN track tension(45%vehicle weight),it could ensure the smooth operation and good performance of the vehicle;the maximum slope obtained by uphill simulation was 30°;in the steering dynamics simulation,the steering stability of the vehicle on the road was better,but it was easy to lose stability when turning,and it would appear lateral inclination.At last,the experiments of straight running,longitudinal climbing and turning of test vehicle were carried out in test site,and it was verified that the vehicle had good trafficability when actually walking in the desert terrain,and can overcome the drawbacks of wheeled transport vehicles sinking in sand,meeting the requirements of current desert terrain transportion operations.