本文针对桥梁管柱基础振动下沉动力要求高,且不能调频等不足,应用动力学理论建立管柱振动体系的数学模型,运用简化牛顿迭代法求解,并设计了计算机程序。经实例计算,不同土质的振动频率,其结果与试验结论相符,为振动下沉管柱调频问题找到了一种有效的途径。 In this paper, aiming at the problems that the foundation of bridge string has high requirement of sinking power and can not be tuned by frequency, the mathematical model of string vibration system is established by using dynamic theory. The simplified Newton iterative method is used to solve the problem and a computer program is designed. The calculation results show that the vibration frequency of different soil is consistent with the experimental conclusion, and an effective way is found for the frequency modulation of sunk column.