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Periodic solution for strongly nonlinear vibration systems by He’s energy balance method. (English) Zbl 1241.34049

The paper presents He’s energy balance method to study periodic solution of the strongly nonlinear system \[ u''+f(u(t))=0~. \] Some examples are given which reveal that even the lowest order approximation are of high accuracy.

MSC:

34C25 Periodic solutions to ordinary differential equations
34A45 Theoretical approximation of solutions to ordinary differential equations
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