轮式起重机的底架,常采用框架式结构,其设计计算理论,目前还不够完善。常用的方法是按空间超静定刚架计算,此时在两根纵梁间若有多根横梁相连系,则计算将很繁冗而不便于应用。另一种方法是文献提出的“α系数法”,此法计算虽较简便,但它没有考虑框架的整体作用,未能计入中间横梁的抗扭能力,从而使α系数和内力的计算很难真实地反映底架的受力情况。为此,本文将探讨一种计算方法,试图克服上述缺陷,便于工程实际应用。 The chassis of a wheeled crane often adopts a frame structure, and its design calculation theory is not perfect yet. Commonly used method is based on statically indeterminate rigid frame calculation, at this time if there are multiple beams between the two stringers connected, then the calculation will be very cumbersome and not easy to apply. Another method is the “α coefficient method” proposed in the literature. Though this method is simple and convenient, it does not consider the overall effect of the frame and fails to account for the torsional resistance of the middle cross beam so that the calculation of α coefficient and internal force Difficult to truly reflect the chassis under stress. To this end, this article will explore a calculation method, trying to overcome the above shortcomings, to facilitate the practical application of the project.