Zastosowanie zmodyfikowanej metody Kryłowa-Bogolubowa do badania drgań swobodnych układów nieliniowych

The paper deals with the free nonlinear vibrations of a system. The asymptotic solution in the sence of Krylov-Bogoliubov of a differential equation is investigated. The extension of the idea proposed by Osiński to solve third order nonlinear differential equation is made.