提出了一种适用于实验测量欠阻尼系统阻尼比的方法，即通过计算相邻两个周期波形的面积之比来测定系统的阻尼比。
A new method of estimating damp ratio of a underdamped system is presented by calculating area ratio of two contiguous periods, which is applicable to experimentation.
由于进动周期的上下限之比通常大于2，因此该方法的计算量比自相关法增大的倍数小于1.4；同时它对先验信息的要求非常宽松。
Usually the ratio of the upper bound to the lower bound is larger than 2, resulting in the computational burden of the proposed method less than 1.4 times of that of the autocorrelation method.
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