Baza Publikacji Pracowników Politechniki Lubelskiej

Status:
Autorzy:	Warmiński Jerzy
Rok wydania:	2010
Wersja dokumentu:	Drukowana \| Elektroniczna
Język:	angielski
Numer czasopisma:	4
Wolumen/Tom:	61
Strony:	677 - 689
Impact Factor:	1,741
Web of Science® Times Cited:	37
Scopus® Cytowania:	41
Bazy:	Web of Science \| Scopus
Efekt badań statutowych	NIE
Materiał konferencyjny:	NIE
Publikacja OA:	NIE
Abstrakty:	angielski
	Vibrations of a nonlinear coupled parametrically and self-excited oscillators driven by an external harmonic force are presented in the paper. It is shown that if the force excites the system inside the principal parametric resonance then for a small excitation amplitude a resonance curve includes an internal loop. To find the analytical solutions the problem is reduced to one degree of freedom oscillators by applications of Nonlinear Normal Modes (NNMs). The NNMs are formulated on the basis of free vibrations of a nonlinear conservative system as functions of amplitude. The analytical results are validated by numerical simulations and an essential difference between linear and nonlinear modes is pointed out.

Nonlinear normal modes of a self-excited system driven by parametric and external excitations