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http://dx.doi.org/10.12989/sss.2015.16.5.919

EMD-based output-only identification of mode shapes of linear structures  

Ramezani, Soheil (Department of Structural Engineering, International Institute of Earthquake Engineering and Seismology)
Bahar, Omid (Department of Structural Engineering, International Institute of Earthquake Engineering and Seismology)
Publication Information
Smart Structures and Systems / v.16, no.5, 2015 , pp. 919-935 More about this Journal
Abstract
The Hilbert-Huang transform (HHT) consists of empirical mode decomposition (EMD) and Hilbert spectral analysis. EMD has been successfully applied for identification of mode shapes of structures based on input-output approaches. This paper aims to extend application of EMD for output-only identification of mode shapes of linear structures. In this regard, a new simple and efficient method based on band-pass filtering and EMD is proposed. Having rather accurate estimates of modal frequencies from measured responses, the proposed method is capable to extract the corresponding mode shapes. In order to evaluate the accuracy and performance of the proposed identification method, two case studies are considered. In the first case, the performance of the method is validated through the analysis of simulated responses obtained from an analytical structural model with known dynamical properties. The low-amplitude responses recorded from the UCLA Factor Building during the 2004 Parkfield earthquake are used in the second case to identify the first three mode shapes of the building in three different directions. The results demonstrate the remarkable ability of the proposed method in correct estimation of mode shapes of the linear structures based on rather accurate modal frequencies.
Keywords
output-only modal identification; mode shapes; Hilbert-Huang transform; empirical mode decomposition; intrinsic mode function; UCLA Factor Building;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Bahar, O. and Ramezani, S. (2014), "Enhanced Hilbert-Huang transform and its application to modal identification", Struct. Des. Tall Spec., 23(4), 239-253.   DOI
2 Bao, C., Hao, H., Li, Z.X. and Zhu X. (2009), "Time-varying system identification using a newly improved HHT algorithm", Comput. Struct., 87(23-24), 1611-1623.   DOI
3 Chopra, A.K. (2001), Dynamics of Structures: Theory and application to Earthquake Engineering, Prentice-Hall, Upper Saddle River, New Jersey, USA.
4 Cunha, A. and Caetano, E. (2006), "From input-output to output-only modal identification of civil engineering structures", SAMCO Final Report, University of Porto, Porto, Portugal.
5 Hazra, B. and Narasimhan, S. (2010), "Wavelet-based blind identification of the UCLA Factor building using ambient and earthquake responses", Smart Mater. Struct., 19(2), 1-10.
6 Huang, N.E., Shen, Z., Long, S.R., Wu, M.C., Shih, H.H., Zheng, Q. et al. (1998), "The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis", Proceedings of Royal Society of London Series A, 454, 903-995.   DOI
7 Huang, N.E. and Bethesda, M.D. (2005), "Computing instantaneous frequency by normalizing Hilbert transform", US Patent 6901353.
8 Liu, B., Riemenschneider, S. and Xu, Y. (2006), "Gearbox fault diagnosis using empirical mode decomposition and Hilbert spectrum", Mech. Syst. Signal Pr., 20, 718-734.   DOI   ScienceOn
9 Liu, TY., Chiang, W.L., Chen, C.W., Hsu, W.K., Lin, C.W., Chiou, D.J. and Huang, P.C. (2012), "Structural system identification for vibration bridges using the Hilbert-Huang transform", J. Vib. Control, 18(13), 1939-1956.   DOI
10 Nayeri, R.D., Masri, S.F., Ghanem, R. and Nigbor, R.L. (2008), "A novel approach for the structural identification and monitoring of a full-scale 17-story building based on ambient vibration measurements", Smart Mater. Struct., 17(2), 1-19.
11 Poon, C.W. and Chang, C.C. (2007), "Identification of nonlinear elastic structures using empirical mode decomposition and nonlinear normal modes", Smart Struct. Syst., 3(4), 423-437.   DOI
12 Wu, Z. and Huang, N.E. (2008), "Ensemble Empirical Mode Decomposition: a noise-assisted data analysis method", Adv. Adapt. Data Anal., 1(1), 1-41.
13 Rilling, G., Flandrin, P. and Goncalves, P. (2003), "On empirical mode decomposition and its algorithms", Proceedings of the IEEE-EURASIP Workshop on Nonlinear Signal and Image Processing, Grado, Italy.
14 Skolnik, D., Lei, Y., Yu, E. and Wallace, J.W. (2006), "Identification, model updating, and response prediction of an instrumented 15-story steel-frame building", Earthq. Spectra, 22(3), 781-802.   DOI
15 Wang, Z. and Chen, G. (2012), "Recursive Hilbert-Huang Transform method for time-varying property identification of linear shear-type buildings under base excitations", J. Eng. Mech.-ASCE, 138(6), 631-639.   DOI
16 Xu, Y.L., Chen, S.W. and Zhang R.C. (2003), "Modal identification of Di Wang Building under Typhoon York using the Hilbert-Huangtransform method", Struct. Des. Tall Spec., 12(1), 21-47.   DOI
17 Yan, B. and Miyamoto, A. (2006), "A comparative study of modal parameter identification based on wavelet and Hilbert-Huang transforms", Comput.-Aided Civil Infrastruct. E., 21(1), 9-23.   DOI
18 Yang, J.N. and Lei, Y. (2000), "System identification of linear structures using Hilbert transform and empirical mode decomposition", Proceedings of the 18th International Modal Analysis Conference: A Conference on Structural Dynamics, San Antonio, TX, Society for Experimental Mechanics Inc., Bethel, CT.
19 Yang, J.N., Lei, Y., Pan, S. and Huang, N.E. (2003a), "System identification of linear structures based on Hilbert-Huang spectral analysis Part 1: Normal modes", Earthq. Eng. Struct. D., 32(9), 1443-1467.   DOI
20 Yang, J.N., Lei, Y., Pan, S. and Huang, N.E. (2003b), "System identification of linear structures based on Hilbert-Huang spectral analysis Part 2: Complex modes", Earthq. Eng. Struct. D., 32(10), 1533-1554.   DOI
21 Yang, J.N., Lei, Y., Lin, S. and Huang, N.E. (2004), "Identification of natural frequencies and dampings of in situ tall buildings using ambient wind vibration data", J. Eng. Mech.-ASCE, 130(5), 570-577.   DOI
22 Zhang, R.C., Ma, S., Safak, E. and Hartzell, S. (2003), "Hilbert-Huang transform analysis of dynamic and earthquake motion recordings", J. Eng. Mech.-ASCE, 129(8), 861-875.   DOI