Wpływ dodatkowych nieliniowych zaburzeń na charakterystyki probabilistyczne klasycznych równań opisujących rgania samowzbudne

In the paper is considered the influence of non-linear terms on the amplitude and frequency of systems with one degree of freedom. The examples presented concern systems which can be described by Van der Pol's and Rayleigh's equations. These systems are forced by stationary, normal stochastic ,,white-noise'' excitations. The analysis is done by means of the methods of harmonic and stochastic linearizations. The results are illustrated by graphs.