介绍了吊装工程中经常采用的所谓“二叉元”型约束绳系动点坐标的有效计算方法,即Picard(比卡)通用算法。该法的收敛性、稳定性、初值任意性是非常卓越的,为工程研究和实用计算提供了简便快捷和高效的计算手段,具有很大的工程价值。 This paper introduces the commonly used method of calculating the moving point coordinate of the so-called “Binary element” restraint rope system in lifting engineering, namely the Picard universal algorithm. The convergence, stability and initial value arbitrariness of this method are very remarkable. It provides a simple, quick and efficient calculation method for engineering research and practical calculation, and has great engineering value.