说明：  增量谐波平衡方法(IHB)是一种有效的定量分析方法，既适用于分析弱非线性振动系统，也适用于分析强非线性振动系统，并且可以提高周期解的精度
(Incremental harmonic balance method (IHB) is an effective method for quantitative analysis, both for the analysis of weakly nonlinear vibration system, also suitable for the analysis strongly nonlinear vibration system, and can improve the accuracy of Periodic Solution)