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RESEARCH PAPERS: Gas Turbines: Structures and Dynamics

Steady-State Response and Stability of Rotating Composite Blades With Frictional Damping

[+] Author and Article Information
T. N. Shiau, J. S. Rao

Department of Mechanical Engineering, National Chung Cheng University, Chia Yi, Taiwan

Y. D. Yu, S. T. Choi

Institute of Aeronautics and Astronautics, National Cheng Kung University, Chia Yi, Tainan, Taiwan

J. Eng. Gas Turbines Power 120(1), 131-139 (Jan 01, 1998) (9 pages) doi:10.1115/1.2818064 History: Received February 01, 1996; Online November 19, 2007

Abstract

Friction dampers are widely used to improve the performance of rotating blades. This paper is concerned with the steady state response and stability analysis of rotating composite plates in the presence of non linear friction damping. Direct Integration Method (DIM) and Harmonic Balance Method (HBM) are used to determine the steady state response due to periodic lateral external forces. In addition, an alternate procedure, Hybrid Method (HM) is proposed for this analysis to substantiate the results from DIM and HBM. The analysis shows that the steady state response is a function of friction damping magnitude as well as its location besides the excitation frequency and the rotational speed. A stability analysis of the composite blades is also made by including periodic in-plane excitation using Floquet-Liapunov theory.

Copyright © 1998 by The American Society of Mechanical Engineers
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