Earthquake Engineering and Engineering Vibration

, Volume 4, Issue 2, pp 295–300

An operational modal analysis method in frequency and spatial domain

Article

DOI: 10.1007/s11803-005-0012-0

Cite this article as:
Wang, T., Zhang, L. & Tamura, Y. Earthq. Engin. Engin. Vib. (2005) 4: 295. doi:10.1007/s11803-005-0012-0

Abstract

A frequency and spatial domain decomposition method (FSDD) for operational modal analysis (OMA) is presented in this paper, which is an extension of the complex mode indicator function (CMIF) method for experimental modal analysis (EMA). The theoretical background of the FSDD method is clarified. Singular value decomposition is adopted to separate the signal space from the noise space. Finally, an enhanced power spectrum density (PSD) is proposed to obtain more accurate modal parameters by curve fitting in the frequency domain. Moreover, a simulation case and an application case are used to validate this method.

Keywords

operational modal analysis modal parameters identification frequency and spatial domain 

Copyright information

© Journal of Earthquake Engineering and Engineering Vibration 2005

Authors and Affiliations

  1. 1.Institute of Vibration EngineeringNanjing University of Aeronautics and AstronauticsNanjingChina
  2. 2.Department of Architectural EngineeringTokyo Institute of PolytechnicsJapan

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