A-operator method (AOM) is used to obtain the approximate analytic solution. According to the results,A-operator method (AOM) overcomes the defaults of harmonic balance method and can keep all frequency components.

• 根据计算结果,A算符方法(AOM)克服了谐波平衡法的缺点,能够得到系统响应的所有频率成分,计算精度更高;