摘要
为了更真实地反映系统的随机因素,提出一种结合随机模拟分析技术与确定性虚拟样机模型的随机虚拟样机模拟方法。基于相对坐标法建立高速履带车辆动力学模型,详细描述履带-地面之间的相互作用关系,考虑了负重轮重复加载对地面变形及接地压力分布的影响。结合履带车辆接地压力分布的计算实例,说明履带车辆随机虚拟样机模型的建模方法、步骤,给出了考虑地面土壤特性参数不确定性时,履带车辆接地压力的区间分布及概率密度分布的计算结果,为不确定环境下履带车辆地面牵引特性及越野机动性评估奠定基础。
In order to reflect random factors of systems more realistically,a kind of stochastic virtual prototype modeling approach is put forward in the paper,which is the combination of stochastic simulation technology and deterministic virtual prototype models.A dynamic model of high velocity tracked vehicles is established based on relative coordinate approach.The model describes the interaction relation between track links and ground,and explains the multi-pass effects of wheels on ground deformation and grounding pressure distributions.In cooperation with the computation example of grounding pressure distributions of tracked vehicles,methods and procedures of stochastic virtual prototype modeling is illustrated,and the computing result of the interval distribution and probability density distribution of grounding pressure distributions of tracked vehicles is presented considering the influence of uncertain soil parameters.The approach establishes an effective basis for the evaluation of the traction performance and mobility of tracked vehicles under uncertainty environments.
出处
《装甲兵工程学院学报》
2013年第1期32-36,共5页
Journal of Academy of Armored Force Engineering
基金
军队科研计划项目
关键词
随机虚拟样机建模
随机模拟
蒙特卡罗
履带接地压力
stochastic virtual prototype modeling
stochastic simulation
Monte Carlo
grounding pressure of tracks
