锥形电杆倒落抱杆整体吊装最优吊点的确定方法

The determination of the optimum restraint nodes on whole erection of the conical transmission pole

采用"弯曲应变能最小准则"确定锥形电杆倒落抱杆整体吊立的最优吊点,运用数值解法搜索设计变量 x的最佳解,并进行算例计算.计算结果表明:按"弯曲应变能最小准则"确定电杆整体吊装吊点位置,截面弯矩与其抗裂弯矩的最大比值显著降低,使电杆吊装抗裂安全度提高,表明用"弯曲应变能最小准则"确定锥形电杆倒落抱杆整体吊装最优吊点是有效的.

The criterion the Minimum Bending Strain Energy is used to determine the optimum restraint nodes of the whole erection of the conical transmission pole with the inverted support and numerical algorithm used to search for the optimum solution of the variables. The results of engineering example have shown that erecting the conical pole by the restraint nodes determined by the criterion, leads to decreasing of the maximum ratio of the section bending moment to its resistant-crack moment and to increasing of the resistant-crack safe degree on the conical pole erection. The study verified that the criterion is efficient.