摘要
本文用摄动法和Ｍｅｌｎｉｋｏｖ法研究Ｄｕｆｆｉｎｇ方程，揭示出非线性系统的若干特性。
Using perturbation method and Melnikov method, Doffing equation has been studied and some properties of nonlinear system has been revealed in this paper.
关键词
摄动法
POINCARE映射
杜芬方程
解
非线性系统
perturbation method
poincare mapping
smales Horseshoe transform
Melnikov function
valve value
