Perlikowski, Marian2020-12-172020-12-172011Mechanics and Mechanical Engineering, Vol. 15, No. 2, 2011, s. 117-1241428-1511http://hdl.handle.net/11652/3122In this paper we show the method of calculation of nonlinear normal modes and its application to mechanical coupled systems. We present bifurcation diagram of nonlinear normal modes in three degree of freedom system. We show the appearance of internal resonances and their important role in dynamics of nonlinear coupled oscillators.ennonlinear normal modescoupled systemscontinuation of periodic solutionsnieliniowe mody normalneukłady sprzężonekontynuacja rozwiązań okresowychartykuł