Substructuring and Wave Propagation: An Efficient Technique for Impeller Dynamic Analysis

[+] Author and Article Information
R. Henry, G. Ferraris

Laboratoire de Mecanique des Structures, CNRS ERA 911, Institut National des Sciences Appliquees, 69621 Villeurbanne, France

J. Eng. Gas Turbines Power 106(1), 2-10 (Jan 01, 1984) (9 pages) doi:10.1115/1.3239547 History: Received December 27, 1982; Online October 15, 2009


This paper is of particular interest of gas turbine designers because it proposes an efficient method for dynamic analysis of rotationally periodic structures encountered in turbomachines. It combines the advantages of a substructure technique and that of wave propagation in periodic systems. The mode shapes and frequencies are obtained from the analysis of a single repetitive sector of the whole structure. The finite element method is the numerical method used. A detailed application of the method to a centrifugal compressor impeller is reported along with experimental verification of the computed results.

Copyright © 1984 by ASME
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