Finite Element Analysis of Blower Impeller Using Cyclic Symmetry

Abstract:

In this paper, we present an efficient method for conducting a finite element analysis of a structure with cyclic symmetry and apply the method to analyze the natural vibration and linear and non-linear static characteristics of a blower impeller. A blower impeller is composed of circumferentially repeated substructures. The whole structure is partitioned into substructures, and the finite element analysis can thus be performed with one representative substructure by using the transformed equations for each number of nodal diameters, which are derived from a discrete Fourier transform. We calculated the natural vibration and linear and non-linear static characteristics of a blower impeller without a stiffening ring, and with small as well as large stiffening rings, respectively. The accuracy and efficiency of the presented method are verified by comparison of the results obtained from the analysis using a substructure to those obtained using the whole structure.

• Periodical: Key Engineering Materials (Volumes 353-358)
• Pages: 1082-1085
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.353-358.1082
• Online since: September 2007
• Authors: Chang Boo Kim, Young Chul Ahn, Bo Yeon Kim, Chong Du Cho, Hyeon Gyu Beom
• Keywords: Blower Impeller, Cyclic Symmetry, Discrete Fourier Transform, Finite Element Analysis (FEA), Linear Static, Natural Vibration, Non-Linear Static

References

[1] D.L. Thomas: Int. J. Numer. Methods Eng. Vol. 14 (1979), pp.81-102.

[2] V. Omprakash and V. Ramamurti: J. Sound Vib. Vol. 125-2 (1988), pp.357-366.

[3] P.C. Kohke: ANSYS Engineering Analysis System Theoretical Manual (Swanson Analysis System INC, 1986).

[4] R.S. Lahey, M.P. Miller and M. Reymond: MSC/NASTRAN Reference Manual (MacNeal- Schwendler Corporation, 1994).