Affiliation of Author(s):机电学院
Journal:Proc. ISMA - Int. Conf. Noise Vib. Eng. USD - Int. Conf. Uncertain. Struct. Dyn.
Abstract:The testing of the dynamic behaviors of rotating machinery is important during its design and using process. Order based modal analysis (OBMA) is a novel modal analysis method of rotor systems under harmonic excitation. This paper utilizes OBMA to identify the resonances from the noise polluted operational data in a turbine's run-up process. First, stationary wavelet transform (SWT) is employed to filter out the uncorrelated noise. Then, an order tracking method is utilized to achieve the accurate harmonic response known as engine orders. Finally, the PolyMAX modal parameter estimation algorithm is applied to identify the resonance frequency, damping and modal shapes. The method simulation was constructed with both big noise and harmonic response during a run-up process. Afterwards, this method was verified by a rotor rig experiment using the run-up data of a laboratory turbine model. © Proceedings of ISMA 2018 - International Conference on Noise and Vibration Engineering and USD 2018 - International Conference on Uncertainty in Structural Dynamics. All rights reserved.
Translation or Not:no
Date of Publication:2018-01-01
Co-author:Zhao, M.,Yue Lin
Correspondence Author:Zhao, M.,Zhao Min
Date of Publication:2018-01-01