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RESEARCH PAPERS: Turbomachinery Vibrations

Vibrations of Twisted Rotating Blades

[+] Author and Article Information
A. W. Leissa, J. K. Lee, A. J. Wang

Department of Engineering Mechanics, Ohio State University, Columbus, OH

J. Vib., Acoust., Stress, and Reliab 106(2), 251-257 (Apr 01, 1984) (7 pages) doi:10.1115/1.3269178 History: Received June 23, 1981; Online November 23, 2009

Abstract

The literature dealing with vibrations of turbomachinery blades is voluminous, but the vast majority of it treats the blades as beams. In a previous paper a two-dimensional analytical procedure was developed and demonstrated on simple models of blades having camber. The procedure utilizes shallow shell theory along with the classical Ritz method for solving the vibration problem. Displacement functions are taken as algebraic polynomials. In the present paper the method is demonstrated on blade models having camber. Comparisons are first made with results in the literature for nonrotating twisted plates and various disagreements between results are pointed out. A method for depicting mode shape information is demonstrated, permitting one to examine all three components of displacement. Finally, the analytical procedure is demonstrated on rotating twisted blade modes, both without and with camber.

Copyright © 1984 by ASME
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