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汽车起重机底架是起重机工作的承载基础,它在工作状态,通过支腿支撑于地面,承受起重机自重和吊重,是一个承受空间力系的空间结构。在中、小型起重机上,约占总重的14～22%。因此,正确计算、合理设计底架,对提高起重机的性能,有着很大影响。在我厂以EQ140通用汽车底盘设计的QY8汽车起重机中,采用了薄壁大箱形结构的底架,作为大幅度减轻起重机自重,提高性能的主要措施之一。但是,对于这种新型底架没有现成合适的计算方法,考虑到有限元法对于完成复杂结构分析,是一种十分有效的方法。因此,对这个薄壁大箱形底架的强度、刚度分析,在同济大学的帮助下,我们尝试运用
The undercarriage of the truck crane is the bearing foundation of the crane work. In the working state, it is supported on the ground by the outriggers and bears the crane’s own weight and hoisting weight. It is a space structure that bears the space force system. In medium and small cranes, it accounts for 14-22% of the total weight. Therefore, the correct calculation and reasonable design of the chassis have a great influence on improving the performance of the crane. In the QY8 truck crane designed by our company with EQ140 GM chassis, a thin-walled, large box-shaped chassis was used as one of the main measures to significantly reduce the weight of the crane and improve its performance. However, no suitable calculation method is available for this new type of chassis, considering that the finite element method is a very effective method for performing complex structural analysis. Therefore, with regard to the strength and stiffness analysis of this thin-walled, large box-shaped chassis, with the help of Tongji University, we tried to use