TY - JOUR
T1 - Vibration based operational modal analysis of rotor systems
AU - Qi, Keyu
AU - He, Zhengjia
AU - Li, Zhen
AU - Zi, Yanyang
AU - Chen, Xuefeng
PY - 2008/8
Y1 - 2008/8
N2 - A novel method is proposed for operational modal analysis OMA of linear rotor systems, combined with correction technique of spectrum analysis (CTSA), harmonic wavelet filtering (HWF), random decrement technique (RDT) and Hilbert transform (HT) method. With CTSA method, operational frequency component is reconstructed and subtracted from rotor vibration signal. The residual signal is composed by harmonics of operational frequency and several model responses. The single mode responses can be obtained by HWF and then RDT method is employed to process these responses, respectively, to extract single mode free responses of the rotor systems. Finally, HT method is applied to obtain modal parameters of the rotor systems from these single mode free responses. The experimental results of the proposed method are close to those of the finite element method which indicates that the proposed method is effective in practical applications.
AB - A novel method is proposed for operational modal analysis OMA of linear rotor systems, combined with correction technique of spectrum analysis (CTSA), harmonic wavelet filtering (HWF), random decrement technique (RDT) and Hilbert transform (HT) method. With CTSA method, operational frequency component is reconstructed and subtracted from rotor vibration signal. The residual signal is composed by harmonics of operational frequency and several model responses. The single mode responses can be obtained by HWF and then RDT method is employed to process these responses, respectively, to extract single mode free responses of the rotor systems. Finally, HT method is applied to obtain modal parameters of the rotor systems from these single mode free responses. The experimental results of the proposed method are close to those of the finite element method which indicates that the proposed method is effective in practical applications.
KW - Modal parameter identification
KW - Operational modal analysis
KW - Rotor system
KW - Vibration measurement
UR - https://www.scopus.com/pages/publications/47549113344
U2 - 10.1016/j.measurement.2007.11.009
DO - 10.1016/j.measurement.2007.11.009
M3 - 文章
AN - SCOPUS:47549113344
SN - 0263-2241
VL - 41
SP - 810
EP - 816
JO - Measurement: Journal of the International Measurement Confederation
JF - Measurement: Journal of the International Measurement Confederation
IS - 7
ER -