基于虚拟样机联合仿真的矿用汽车车架强度计算方法

由于缺乏有效的载荷谱,矿用汽车车架的载荷通常采用估算的方法,该方法会造成车辆的可靠性和经济性无法保证。针对上述问题,本文首先建立了整车三维模型,采用Adams动力学分析模块搭建了整车虚拟样机,运用数理统计的方法确定计算对象的安全系数,并设置了典型工况进行动力学仿真,在此基础上获得了车架动态载荷,最后建立了车架的有限元模型,基于动态下仿真载荷对车架的应力进行计算。在无法提取实际载荷谱的情况下,相比于载荷估算方法,基于虚拟样机的车架强度计算方法可以准确计算出车架在不同工况下所受的纵向力,从而有助于获得可信度更高的强度计算结果。

Strength calculation method of mining truck frame based on virtual prototype joint simulation

Due to the lack of effective load spectrum, the load of mining truck frame is usually estimated, which will cause the reliability and economy of the vehicle can not be guaranteed. In order to solve these problems, the thesis first establishes a three-dimensional model of the whole vehicle, uses Adams dynamic analysis module to build a virtual prototype of the whole vehicle, uses mathematical statistics method to determine the safety factor of the calculation object, and sets up typical working conditions for dynamic simulation, on this basis, obtains the dynamic load of the frame. Finally, the finite element model of the frame is established, and the stress of the frame is calculated based on the dynamic simulation load.When the actual load spectrum can not be extracted, compared with the load estimation method, the strength calculation method based on virtual prototype can accurately calculate the longitudinal force of the frame under different working conditions, which is helpful to obtain the strength calculation results with higher reliability.