Abstract
A new procedure to identify modal parameters is proposed to take into account harmonic components while applying techniques originally suitable for random inputs only. This operational modal analysis technique is based on the natural excitation approach where the correlation functions of the outputs are considered as impulse responses. Modal parameters are then obtained using identification method like the Least Square Complex Exponential. In the presence of harmonic components, we propose to modify the identification algorithm so that, even when the harmonic part of the response has a frequency close to eigenfrequencies, modal parameters can still be identified accurately.
Original language | English |
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Title of host publication | Computational Fluid and Solid Mechanics 2003 |
Publisher | Elsevier Inc. |
Pages | 477-481 |
Number of pages | 5 |
ISBN (Electronic) | 9780080529479 |
ISBN (Print) | 9780080440460 |
DOIs | |
State | Published - 2 Jun 2003 |
Externally published | Yes |
Keywords
- Harmonic response
- Modal testing
- Operational modes
- Random vibration
- System identification