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本文的理论计算分析表明,双吊点位置的变动对臂架的弯矩分布会产生明显的影响,从均匀臂架受力的观点来选择双吊点的位置是设计时应当考虑的基本要求。一、双吊点臂架在力学性能方面的优点双吊点臂架由于增加了一个支承吊点,与单吊点臂架相比在内力和变形方面带来了三个主要的变化。一是臂架吊点截面的弯矩和二跨的跨中弯矩都较单吊点时小得多,并且各截面间的弯矩差值也较单吊点时小得多,也就是通常所说的,双吊点均匀了臂架
The theoretical calculation and analysis of this paper show that the variation of the position of the two hanging points has a significant effect on the bending moment distribution of the boom. Selecting the position of the double hanging point from the viewpoint of uniform boom is the basic requirement that should be considered in design. First, the double-point boom in the mechanical properties of the advantages of double-point boom because of the addition of a lifting point, compared with the single-point boom in the internal forces and deformation brought three major changes. First, the moment of crane lifting point cross-section and the span of the two spans are much smaller than the single lifting point, and the bending moment difference between the sections is much smaller than when the lifting point, which is usually Said, double-point uniform boom