Based on the correlation principle, an algorithm to decomposite the damped free vibration signals of a two degrees of freedom system with close natural frequencies is put forward.

• 摘要基于单一频率成分的自由衰减振动响应信号的相关性原理，提出了一种频率密集成分的两耦合振子自由衰减振动响应信号的解耦算法。