Dynamics of Cracked Rotating Blades

[+] Author and Article Information
Jörg Wauer

Institut für Technische Mechanik, Universität Karlsruhe, Kaiserstraße 12, W-Karlsruhe 1, Germany

Appl. Mech. Rev 44(11S), S273-S278 (Nov 01, 1991) doi:10.1115/1.3121364 History: Online April 30, 2009


The modeling and formulation of equations of motion for a cracked rotating blade are studied. The proposed model is a Bernoulli-Euler beam with a single transverse crack. Two fields are connected by a local spring element characterizing the reduced stiffness of the crack region. First, the governing nonlinear boundary value problem is derived. Next, the stationary deformation state is dealt with. Finally, the linearized equations of motion for small superimposed oscillations are formulated. The paper corresponds with another one of the same author on cracked rotating shafts and shows that several essential modifications are necessary.

Copyright © 1991 by American Society of Mechanical Engineers
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