【摘要】 对机翼／外挂次谐颤振响应作近似分析。从机翼分离出的外挂被视为简谐激振力作用下的带间隙分段线性振子，研究这种振子的对称周期响应及其分叉。采用Ｐｏｉｎｃａｒｅ映射方法得出分叉条件，再用当量线化法导出分叉条件近似式，并用它来预示机翼／外挂颤振系统的次谐响应。算例表明这种近似分析是可行的。更多还原

【Abstract】 An approximate analysis of wing/store subharmonic flutter response is discussed.The store separated from the wing is treated as piecewise linear oscillator with clearance under harmonic excitation. The symmetric periodic response and bifurcation of such an oscillator is studied.The bifurcation is analysed by Poincare map method and a bifurcation condition is ob-ained. By using equivalent linearization method, and approximate bifurcation equation is derived and is applied to predict the subharmonic response of awign/store flutter system, Feasi-bility of the approximate analysis procedure is confirmed by illustrative example.更多还原