A modified Lindstedt-Poincare' method is presented for extending the range of the validity of perturbation expansions to strongly non-linear oscillation of single degree-of-freedom systems. A new parameter alpha = alpha-(epsilon), which differs from Jones' and Burton's, is defined such that the value of alpha is always kept small regardless of the magnitude of the original parameter epsilon. Therefore, a strongly non-linear system with large parameter epsilon is transformed into a small parameter system with respect to alpha. This method is suitable for the system with even non-linearities as well as with odd non-linearities.
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Sun Yat Sen Univ, Dept Appl Mech & Engn, Guangzhou 510275, Guangdong, Peoples R ChinaSun Yat Sen Univ, Dept Appl Mech & Engn, Guangzhou 510275, Guangdong, Peoples R China
Chen ShuHui
Chen YangYang
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Guangzhou Univ, Earthquake Engn Res & Test Ctr, Guangzhou 510405, Guangdong, Peoples R ChinaSun Yat Sen Univ, Dept Appl Mech & Engn, Guangzhou 510275, Guangdong, Peoples R China
Chen YangYang
Sze Kam Yim
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Univ Hong Kong, Dept Mech Engn, Pokfulam, Hong Kong, Peoples R ChinaSun Yat Sen Univ, Dept Appl Mech & Engn, Guangzhou 510275, Guangdong, Peoples R China