Manevitch, Leonid I.Smirnov, Valeri V.2016-11-222016-11-222016Manevitch L. I. Semi-Inverse Method in the Nonlinear Dynamics / L. I. Manevitch, V. V. Smirnov // Nonlinear Dynamics–2016 (ND-KhPI2016) : proceedings of 5th International Conference, dedicated to the 90th anniversary of Academician V. L. Rvachev, September 27-30, 2016 = Нелінійна динаміка–2016 : тези доп. 5-ї Міжнар. конф., 27-30 вересня 2016 р. – Kharkov : NTU "KhPI", 2016. – P. 28-37.https://repository.kpi.kharkov.ua/handle/KhPI-Press/24789The semi-inverse method based on using an internal small parameter of the nonlinear problems is discussed on the examples of the chain of coupled pendula and of the forced pendulum. The efficiency of such approach is highly appeared when the non-stationary dynamical problems are considered. In the framework of this method we demonstrate that both the spectrum of nonlinear normal modes and the interaction of them can be analysed successfully.ennonlinear dynamicssemi-inverse methodnonlinear normal modesArticle