✦ LIBER ✦

DYNAMIC STABILITY OF ROTATING BLADES WITH GEOMETRIC NON-LINEARITY

✍ Scribed by L.-W. Chen; W.-K. Peng

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 405 KB
Volume: 187
Category: Article
ISSN: 0022-460X
DOI: 10.1006/jsvi.1995.0533

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✦ Synopsis

The dynamic stability behavior of a rotating blade subjected to axial periodic forces is studied by Lagrange's equation and a Galerkin finite element method. The effects of geometric non-linearity, shear deformation and rotary inertia are considered. The iterative method is used to get the mode shapes and frequencies of the non-linear system. Dynamic instability regions of the blade with different reference amplitudes of vibration are illustrated graphically. The instability regions shift to the side of high frequency ratios and the widths of the regions decrease if the reference amplitude is increased. The increase of the reference amplitude consequently makes the blades more stable.

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