The two kind of harmonic balance methods , analytical hbm and dft numerical hba , are used for the analysis of the parametrically excited flexible cam - follower system with consideration of the clearance between cam and follower . through the two methods , the system equation is reduced to a series of nonlinear algebraic equations 這種非線性代數(shù)方程組需要依靠數(shù)值計算的迭代法才能求解,而由于問題的復(fù)雜性,普通的newton法很難求解,本文采用一種廣泛應(yīng)用的擬newton法一一broyden方法來求解,得出了出含間隙凸輪系統(tǒng)模型的穩(wěn)態(tài)響應(yīng)。