【摘要】 为了对载重越野车辆的地形通过性指标进行评价,本文首先对车辆的轮胎、悬架等关键模型进行了分析,得出了轮胎内压与轮胎刚度基本成线性关系的事实,并建立了轮胎的粘弹性有限元模型。研究了悬架的刚度一阻尼模型,并以多体动力学理论建立了车辆的7自由度运动学模型。对比分析了微分一代数方程组解法的优缺点,采用Gear算法实现了方程组的解算。实车试验与仿真结果对比表明,本文建立的地形通过性仿真系统与实车测试有较好的吻合性。更多还原

【Abstract】 In order to estimate the terrain trafficability of the the off-read truck,the tire model and the suspension model were analyzed.The linear relations between pressure and stiffness was derived and the FEM tire mode was constructed.After researching the stiffness-damp model of the suspension,the 7 DOF model of the off-read truck was estimated based on the multi- body dynamics.The experiment result shows that the simulation system of the terrain trafficability is reasonable.更多还原