本文提出了求解具有单一对称平面的基础在该对称平面内滑移、摇摆、竖向三个自由度耦合振动系统固有频率的一个迭代解法,通过两组迭代,可以求出系统全部三个阻尼固有频率。该法运算比较简单,对一般阻尼振动问题收敛得也较快,可适用于工程计算。 This paper proposes an iterative solution to the natural frequency of a three-degree-of-freedom coupled vibration system with a single plane of symmetry based on slip, roll, and vertical in the plane of symmetry. Through two sets of iterations, it is possible to find all three systems inherently damped. frequency. The method is relatively simple to operate and it converges quickly for general damping vibration problems, and can be applied to engineering calculations.