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research-article

DYNAMIC STABILITY ANALYSIS FOR A FLEXIBLE ROTOR FILLED WITH LIQUID BASED ON THREE-DIMENSIONAL FLOW

[+] Author and Article Information
Guangding Wang

School of Mechanical Engineering and Automation, Northeastern University, Shenyang, China
wgd_vib@yeah.net

Huiqun Yuan

Institute of Applied Mechanics, College of Science, Northeastern University, Shenyang, China
hq_yuan@yeah.net

1Corresponding author.

ASME doi:10.1115/1.4041392 History: Received May 04, 2018; Revised August 29, 2018

Abstract

This paper deals with the dynamic stability of a flexible liquid-filled rotor. On the basis of three-dimensional flow, the fluid perturbation motion is analyzed and the fluid-structure interaction equation is established, combining with continuity equation, the expression of fluid force exerted on rotor is derived in terms of Fourier series expansion. Considering the complex nonlinear relationship between fluid dynamic pressure and the rotor deformation function, they are expanded in terms of the eigenfunction of a dry rotor. The whirling frequency equation of a flexible rotor partially filled with liquid is obtained based on the rotor static equilibrium equation. Finally, the numerical technique is used to analyze the dynamic stability of the rotor system, and the influences of system parameters on unstable region are discussed.

Copyright (c) 2018 by ASME
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