双机四点吊是混凝土长柱常用的一种起吊方式 ,文章以“弯曲应变能最小”为原则 ,采用“三步循环坐标搜索法 ,选出最佳 3种绳系的最优吊点位置 ,计算出各旋转状态截面弯矩、应变能。通过对比确定第 3种绳系型式 (m7,2=3,m7,3=2 ,m8,4=m8,5=1 ,λ1 =0 .1 2 5640 ,λ2 =0 .2 3751 7,λ3=0 .2 1 8740 ,λ4=0 .2 92 4 63)为最佳方案。 Double-point four-point crane is a kind of lifting method commonly used in concrete long columns. According to the principle of “minimum bending strain energy” and “three-step cycle coordinate search method”, the optimal lifting point position of the best three kinds of rope systems , Calculate the bending moment and strain energy of each rotating state section, and determine the third type of rope system by comparison (m7,2 = 3, m7,3 = 2, m8,4 = m8,5 = 1, λ1 = 2 5640, λ2 = 0 .2 3751 7, λ3 = 0 .2 1 8740, λ4 = 0 .2 92 4 63) is the best solution.