ANISOTROPY AND STRUCTURAL COUPLING ON VIBRATION AND INSTABILITY OF SPINNING THIN-WALLED-BEAMS

The problem of the mathematical modelling of anisotropic beams rotatin g with constant angular speed about their longitudinal body-axis fixed in the inertial space is addressed. The analysis is conducted in the context of a refined theory of thin-walled anisotropic composite beams which incorporates a number of non-classical effects. Among them, the re are the transverse shear, the primary and secondary warping effects . Special attention is paid to the influence played by anisotropy of c onstituent materials, boundary conditions and spinning speed on forwar d and backward precession frequencies and on instability speed. A numb er of applications involving both axisymmetric and doubly symmetric cr oss-section beams are presented and pertinent conclusions are outlined . (C) 1997 Academic Press Limited.