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The amplitude q0 =1000. The form of the signal, power spectrum, phase portrait, Poincare’s representation (Figs. 5a–5d) indicates the complex multifrequency vibrations; in this case, the frequencies
ω1 , ω2 , ω3 , ω4 , ω p described above are the fundamental frequencies. Let us note that the characteristics mentioned provide no information on the variation of the vibration process in time at the
specified parameters ωp ,q0 . Unlike them, the Morlet wavelet (see Figs. 5e–5f) shows that at the initial moment of time the vibrations occur at two independent frequencies ωp, ω1 and the frequency ω4. At t∈[600;700], the frequencies ω2, ω3 appear and almost at the same time disappear. The vibration character over the interval t ∈[700;760] is similar to the character for t ∈[0;600]. At t > 760 , the vibrations occur at all frequencies indicated.
From the same paper as the previous 2 images.
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