ON THE SIGNIFICANCE OF ANTIRESONANCE FREQUENCIES IN EXPERIMENTAL STRUCTURAL ANALYSIS

✍ Scribed by F. Wahl; G. Schmidt; L. Forrai

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 186 KB
• Volume: 219
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1998.1831

✦ Synopsis

The resonance-antiresonance behaviour of frequency response functions (FRFs) for linear lightly damped structures is discussed. The focus is on the significance of antiresonances in experimental structural analysis. Consideration of the relationship between the resonance-antiresonance behaviour and structural modification gives a physical interpretation of the phenomenon of antiresonances. It shows that the antiresonance frequencies of measured FRFs provide useful information on the dynamic properties of a test structure. So, from the experimentally determined antiresonance frequencies of a structure under arbitrary boundary conditions, it is possible to determine the resonance frequencies of the structure under ideal boundary conditions which are impossible to achieve in laboratory tests. The results presented serve as a basis for further experimental research in fields such as identification, updating finite element models, and location of structural faults.