【摘要】 本文以ZJ-20井架为例,列举各种可能的悬挂点,分别计算了零度起升状态的杆力,并按结构优化理论中力学准则设计的应力比法,算出在各种悬挂点下各杆在满应力时的截面积,经分析比较,确定井架起升状态的最佳悬挂点。更多还原

【Abstract】 This article, taking ZJ—20 mast as an example and using various possible attaching-points for the slinglines, calculates the forces on the strained mast-members during raising the mast from the horizontal and the required cross-sections of the members under full stress in the discussed cases by using the stress ratio method according to the theory of structure optimization, and finally, offers the optimum points for attaching the slinglines.更多还原