@inproceedings{e819d981ffe64835889e0202263c6670,
title = "Extraction of real modes and physical matrices from modal testing",
abstract = "A technique is presented to extract real modes from the identified complex modes, where the most important characteristic is that the normalized real mode shapes, modal masses, full or reduced mass and stiffness matrices can be obtained. The theoretical derivation of the method is presented in details. An 11-DOF (degree of freedom) vibration system is used to validate the algorithm, and to analyze the effects of utilizing different modes and measurement DOFs on the extraction results. It is found that the low frequency modes are easier to be correctly extracted than the high ones. It is recommended to locate the measurement DOFs along the whole structure, and to compute the real modes in a group with only two or three closely-spaced modes. Finally, the method is applied to extract the normalized real modes of an aluminum disk from the complex modes identified in an impact hammer test.",
keywords = "Complex mode, Modal analysis, Modal mass, Normalized mode shape, Real mode",
author = "Tong Wang and Lingmi Zhang and Tee, \{Kong Fah\}",
year = "2011",
language = "English",
series = "Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011",
publisher = "University of Southampton, Institute of Sound Vibration and Research",
pages = "2523--2529",
editor = "G. Lombaert and G. Muller and \{De Roeck\}, G. and G. Degrande",
booktitle = "Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011",
note = "8th International Conference on Structural Dynamics, EURODYN 2011 ; Conference date: 04-07-2011 Through 06-07-2011",
}