Abstract
Modal testing practitioners are well accustomed to FRFs which, nowadays, can be measured and analysed by a large variety of methods and tools. However, most of the tools for linear modal analysis are practically unusable when the frequency response is amplitude dependent. Hence, the methods based on the properties of the Nyquist circle become unavailable because of the loss of its circularity and completeness. Nevertheless, FRFs of well-isolated modes can still be processed by calculating the modal parameters for every pair of receptance points taken at equal amplitude either side the maximum response peak. The major limitation of this method is the absence of one branch of the response function due to unstable dynamics. The objective of this work is to show that incomplete FRF functions can be still processed to obtain the modal parameters. The method is benchmarked against a single degree of freedom both for linear and nonlinear response conditions.
Original language | English |
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Title of host publication | Proceedings of ISMA 2018 - International Conference on Noise and Vibration Engineering and USD 2018 - International Conference on Uncertainty in Structural Dynamics |
Editors | D. Moens, W. Desmet, B. Pluymers, W. Rottiers |
Place of Publication | Leuven |
Publisher | Katholieke Universiteit Leuven |
Pages | 2661-2672 |
Number of pages | 12 |
ISBN (Electronic) | 9789073802995 |
Publication status | Published - 2018 |
Event | 2018 International Conference on Noise and Vibration Engineering, ISMA 2018 - Campus Social Sciences, Leuven, Belgium Duration: 17 Sept 2018 → 19 Sept 2018 Conference number: 28 |
Conference
Conference | 2018 International Conference on Noise and Vibration Engineering, ISMA 2018 |
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Abbreviated title | ISMA 2018 |
Country/Territory | Belgium |
City | Leuven |
Period | 17/09/18 → 19/09/18 |