【摘要】 应用三维造型软件建立了某矿用自卸车车架实体几何模型,给出了车架应力分析时的模型简化方法。根据自卸车整车的装配关系和车架的受力特点确定了车架强度有限元分析的边界条件,在此基础上建立了包括A形架、横拉杆、前桥、后桥和油气悬挂在内的整车有限元模型。依据矿用自卸车的典型受力选取满载静止、启动、制动和举升作业作为分析工况,应用ANSYS软件求解得到各工况下车架的应力大小和应力分布规律。结果表明:车架在满载弯扭组合工况下应力最大,强度安全系数仅为1.47;启动工况应力最小,强度安全系数为3.82。更多还原

【Abstract】 A solid geometric model is set up for a mining hauler’s frame with 3D modeling software. A method to simplify the model is presented for stress analysis of the frame. Boundary conditions for finite element analysis of the frame strength are determined according to assembly relation among the whole hauler vehicle as well as loading characteristics of the frame. On the basis of that, a finite element model of the whole vehicle including A frame, cross bar, front axle, rear axle and oil-air suspension is established. Aiming at typical loading conditions of a mining hauler, operations of fully-loaded stand still, starting, braking and lifting are selected as analysis work conditions, stresses and stress distribution regularities are obtained by applying ANSYS software. The results show that the maximum stresses occur under work condition combining the fully-load and bending torque and safety coefficient of strength is only 1.47; the minimum stresses occur under starting condition and the safety coefficient is 3.82.更多还原