Dynamic Analysis of an Assembly of Shrouded Blades Using Component Modes

[+] Author and Article Information
A. V. Srinivasan, S. R. Lionberger, K. W. Brown

Commerical Products Division, Pratt & Whitney Aircraft, United Technologies Corporation, East Hartford, Conn.

J. Mech. Des 100(3), 520-527 (Jul 01, 1978) (8 pages) doi:10.1115/1.3453961 History: Received June 24, 1977; Online October 21, 2010


The problem of vibratory behavior of an assembly of shrouded fan blades is examined. The point of view that forms the basis for the analysis is that the vibration characteristics of an assembly of blades can be predicted from a knowledge of vibration characteristics of its components. Clearly, linear behavior is assumed. A viscous type of damping mechanism is included to account for any energy dissipation due to vibratory rubbing action at shroud interfaces. As the component modes are computed with a single blade and shroud modelled with plate elements, the extent of chordwise motion in different modes is examined. Numerical results of an application of the analysis to a typical fan design are included.

Copyright © 1978 by ASME
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