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前言汽车起重机的底架,是由钢板焊接起来装配而成的组合空间体系,构造甚为复杂,其支承条件也因载荷工况不同而异。本文根据一机部和国家建委下达的科研任务,结合生产需要,对国内首批研制的QY16大箱型底架,进行了有限元分析,并对计算结果作了比较全面的试验验证,取得了较好的结果。从而为汽车起重机的底架设计,提供了新的计算理论,方法与经验,对于提高产品的设计技术水平,具有一定的理论价值和实际指导意义。一、底架构造与计算模型QY16底架(图1)采用H型支腿,固定腿与大梁焊成一体。在前后支腿之间,大梁由三
Foreword The undercarriage of a truck crane is a composite space system assembled from welded steel plates. The construction of the crane is complex and its support conditions vary depending on the load conditions. Based on the research tasks issued by the Ministry of Machine Building and the National Construction Committee, and combined with production needs, this paper conducted a finite element analysis on the QY16 large box chassis developed in China and made comparatively comprehensive test verification on the calculation results. Better results. This provides a new calculation theory, method and experience for the chassis design of truck cranes. It has certain theoretical value and practical guidance significance for improving the design technology level of products. First, the chassis structure and calculation model QY16 chassis (Figure 1) using H-type legs, fixed legs welded with the beam into one. Between the front and rear legs, the beam consists of three