Baza Publikacji Pracowników Politechniki Lubelskiej

Status:
Autorzy:	Lenci Stefano, Clementi Francesco, Warmiński Jerzy
Rok wydania:	2015
Wersja dokumentu:	Drukowana \| Elektroniczna
Język:	angielski
Numer czasopisma:	3
Wolumen/Tom:	50
Strony:	675 - 688
Impact Factor:	1,828
Web of Science® Times Cited:	22
Scopus® Cytowania:	30
Bazy:	Web of Science \| Scopus
Efekt badań statutowych	NIE
Materiał konferencyjny:	NIE
Publikacja OA:	NIE
Abstrakty:	angielski
	The nonlinear free vibrations of a two-layer elastic composite beam are investigated. Different boundary conditions, both symmetric and not symmetric with respect to the beam midpoint, equal on both layers and different on each layers, are considered. The analysis is developed by means of the multiple time scale method, and at each order of the asymptotic development, we obtain different information. The first order terms provide the linear natural frequencies. The first, the second and the third natural frequencies are computed explicitly. The next order terms, on the other hand, provide the nonlinearity coefficients measuring the nonlinear amplitude dependence of the natural frequencies, i.e. the curvature of the backbone curve. Both the linear frequencies and the nonlinear coefficients are found to be dependent on two dimensionless parameters only and, for boundary conditions different on each layer, also of the ratio between the axial stiffnesses of each layer.

Nonlinear free dynamics of a two-layer composite beam with different boundary conditions