摘要
为了研究轮式拖拉机在典型路况下轮胎的受力情况,该文采用多体动力学软件RecurDyn进行轮式拖拉机建模,建立了包含4个车轮、前轴、后轴以及车架的简化模型,并给前轴和后轴施加合理的质量。利用RecurDyn的Fiala轮胎模块建立了轮胎与地面的相互作用模型,分别对轮式拖拉机在上20°坡、上44°极限坡、下20°坡和下34°极限坡等情况下的轮胎位移和受力进行了仿真分析,同时比较了拖拉机在两种不同车速情况下的轮胎受力。结果表明,在不同的坡度下行驶时,轮式拖拉机前轮受到的冲击力差别明显,上44°坡时受到的最大冲击力比上20°坡时增加了67.73%,下34°坡时受到的最大冲击力比下20°坡时减少了8%;在相同的路面条件下,当拖拉机以0.678m/s过圆柱形障碍物时,前轮受到的最大作用力比在车速1.356m/s时减小了16.13%。仿真分析结果可为轮式拖拉机轮胎受力研究提供参考。
In order to study the force on tire of wheeled tractor on typical road conditions,a simulation model of wheeled tractor was built using the multi-body dynamics software RecurDyn.The model consisted of four wheels,fore and rear axles,and a body frame,and the axles were imposed on certain load appropriately.An interaction model between tires and soft soil was established using the Fiala tire module of RecurDyn.The simulations of displacement and force of the tires were conducted on 20°upslope,44°ultimate upslope,20°downslope and 34° ultimate downslope roads respectively.The tire force that the wheeled tractor run over a cylindrical obstacle was analyzed under two different speeds.Results showed that the difference of the impact forces applied on the front wheel was obvious on different slope roads.The maximum impact force of the front wheel on 44°upslope was 67.73%higher than that on 20°upslope.The maximum impact force of the front wheel on 34°downslope decreased by 8%compared with that on 20°downslope.The maximum force of the front wheel decreased by 16.13%when the wheeled tractor over a cylindrical obstacle with the speeds decreasing from 1.356 m/s to 0.678 m/s.The analysis results provided references for the study on the tire force of wheeled tractor.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2009年第S2期61-65,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家科技支撑计划项目(2006BAD11A17)
