A Reduced-Order Model Method for Blade Vibration Due to Upstream Wake Based on the Harmonic Balance Method

LUO Xiao; ZHANG Xinyan; ZHANG Jun; LI Lizhou; YANG Minglei; YUAN Meini

doi:10.21656/1000-0887.380294

Volume 39 Issue 8

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Article Navigation > Applied Mathematics and Mechanics > 2018 > 39(8): 892-899

LUO Xiao, ZHANG Xinyan, ZHANG Jun, LI Lizhou, YANG Minglei, YUAN Meini. A Reduced-Order Model Method for Blade Vibration Due to Upstream Wake Based on the Harmonic Balance Method[J]. Applied Mathematics and Mechanics, 2018, 39(8): 892-899. doi: 10.21656/1000-0887.380294

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A Reduced-Order Model Method for Blade Vibration Due to Upstream Wake Based on the Harmonic Balance Method

doi: 10.21656/1000-0887.380294

¹College of Mechatronics Engineering, North University of China, Taiyuan 030051, P.R.China;²Department of Mathematics, Taiyuan University, Taiyuan 030001, P.R.China

Funds: The National Natural Science Foundation of China（51775518）

Received Date: 2017-11-23
Rev Recd Date: 2018-06-07
Publish Date: 2018-08-15

Abstract

Abstract

In aero-engines, downstream blades are forced to vibrate by the upstream wake, which often severely affects the flutter and fatigue performance of blades. Hence, an efficient method is needed for the analysis of this complex fluid-structure interaction phenomenon. A reduced-order model (ROM) method for blade vibration was proposed based on the harmonic balance method. The upstream wake was firstly decomposed into a number of harmonic waves by FFT (fast Fourier transform), and the aerodynamic forces on the blade were obtained through calculation of the amplitudes of aerodynamic forces on the blade due to each harmonic wave; then the blade vibration was fast analyzed by means of the structure dynamic equations for the blade coupled with the aerodynamic ROM. The results show that this method can analyze the flutter characteristics of the blade under wake excitation quickly and accurately.
- wake,
- flutter,
- aerodynamic force,
- blade,
- Fourier series

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References(15)

References

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