Baza Publikacji Pracowników Politechniki Lubelskiej

Status:
Autorzy:	Latalski Jarosław, Warmiński Jerzy
Wersja dokumentu:	Drukowana
Język:	angielski
Strony:	368 - 368
Efekt badań statutowych	NIE
Materiał konferencyjny:	NIE
Publikacja OA:	NIE
Abstrakty:	angielski
	The paper discusses the modes coupling in vibrations of a rotating composite thin-walled beam. The proposed analytical model takes into account axial and torsional deformations, as well as flapwise and chordwise bending. Moreover, a number of nonclassical effects like shear deformation and primary and secondary warpings are considered. To make the study more general a case of a nonconstant rotating speed and an arbitrary beam’s preset (pitch) angle is analysed. The governing differential equations of motion have been derived from the Hamilton’s principle. It has been shown that the resulting relations are strongly coupled together and form a nonlinear system of PDEs. Next, the system of ordinary differential equations has been obtained by virtue of the Galerkin’s procedure. Parametric studies of natural frequencies and possible couplings between vibration modes that can be observed depending on the composite fiber orientation are performed. Impact of different cases of symmetric, antisymmetric and non-symmetric laminae lay-ups, as well as variable rotating speed is also discussed. It is shown that appropriate choice of composite fibers orientation and laminate stacking sequence enables one to achieve an intended complex behavior of rotating structures.

On coupled vibrations of thin-walled rotating composite beams: parametric studies