基于离散元法的煤炭运矿车强度计算

Strength calculation of underground coal dump truck based on discrete element method

针对目前运矿车结构强度分析,施加载荷环节往往依靠经验或简单计算进行预估,分析结果不能完全真实地反映车体实际受力情况。将离散元方法引入到设备有限元强度校核中,建立煤料离散元模型,通过模拟装载过程,获取煤料离散单元对车体的作用力,然后将数据导入到有限元软件中进行耦合,进行强度校核。该方法真实地将煤料对车体的作用力准确地施加到有限元模型中,可得到车体应力应变,以及根据计算比例因子,得到料斗所受可信作用力。该研究将为改进运矿车的设计和使用性能,提高产品生产效率,提供强大依据。

At present in structural strength analysis of underground dump truck,the pre-estimate of applied stress usually depends on experience and simple calculation,leading to large deviation. In the paper,the discrete element method is introduced to the finite element strength check. The coal material＇s discrete element model is established to simulate the material loaded process,and acquire the applied force of the truck body from coal material discrete element. Then the finite element software is used to conduct coupling and strength checking with the obtained data. The method can accurately apply the force of coal material to the finite element model,get the stress and strain of the vehicle body,and obtain the credible force of the hopper according to the calculation scale factor.