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Izvorni znanstveni članak
https://doi.org/10.21278/TOF.43303

Experimental Study on the Effect of Excitation Type on the Output-Only Modal Analysis Results

Sina Varahram ; Vibration and Modal Analysis Research Lab, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
Peyman Jalali ; Vibration and Modal Analysis Research Lab, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
Morteza H. Sadeghi ; Vibration and Modal Analysis Research Lab, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
Saeed Lotfan ; Vibration and Modal Analysis Research Lab, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran

Puni tekst: engleski, pdf (1 MB) str. 37-52 preuzimanja: 64* citiraj
APA 6th Edition
Varahram, S., Jalali, P., Sadeghi, M.H. i Lotfan, S. (2019). Experimental Study on the Effect of Excitation Type on the Output-Only Modal Analysis Results. Transactions of FAMENA, 43 (3), 37-52. https://doi.org/10.21278/TOF.43303
MLA 8th Edition
Varahram, Sina, et al. "Experimental Study on the Effect of Excitation Type on the Output-Only Modal Analysis Results." Transactions of FAMENA, vol. 43, br. 3, 2019, str. 37-52. https://doi.org/10.21278/TOF.43303. Citirano 29.02.2020.
Chicago 17th Edition
Varahram, Sina, Peyman Jalali, Morteza H. Sadeghi i Saeed Lotfan. "Experimental Study on the Effect of Excitation Type on the Output-Only Modal Analysis Results." Transactions of FAMENA 43, br. 3 (2019): 37-52. https://doi.org/10.21278/TOF.43303
Harvard
Varahram, S., et al. (2019). 'Experimental Study on the Effect of Excitation Type on the Output-Only Modal Analysis Results', Transactions of FAMENA, 43(3), str. 37-52. https://doi.org/10.21278/TOF.43303
Vancouver
Varahram S, Jalali P, Sadeghi MH, Lotfan S. Experimental Study on the Effect of Excitation Type on the Output-Only Modal Analysis Results. Transactions of FAMENA [Internet]. 2019 [pristupljeno 29.02.2020.];43(3):37-52. https://doi.org/10.21278/TOF.43303
IEEE
S. Varahram, P. Jalali, M.H. Sadeghi i S. Lotfan, "Experimental Study on the Effect of Excitation Type on the Output-Only Modal Analysis Results", Transactions of FAMENA, vol.43, br. 3, str. 37-52, 2019. [Online]. https://doi.org/10.21278/TOF.43303

Sažetak
Output-only Modal Analysis (OMA) has found extensive use in the identification of dynamic properties of structures. This study aims to investigate the effect of excitation force on the accuracy of modal parameters. For this purpose, the modal parameters of a simply supported beam are obtained through the Experimental Modal Analysis (EMA) and the OMA method using three different types of artificial and natural excitations, namely a shaker, acoustic waves, and environmental noise. Frequency Domain Decomposition (FDD) technique is used to identify dynamic characteristics. Finally, these results are compared with those obtained by the analytical method and the EMA method. The results demonstrated the following: 1) Acoustic excitation presents the natural frequencies with the smallest errors in comparison with the analytical results. 2) Inaccuracy is observed at certain natural frequencies during the excitation with a shaker with respect to the connecting point between the shaker and the beam. 3) Modal Assurance Criterion (MAC) showed that the mode shapes extracted by the acoustic excitations are more similar to the analytical results.

Ključne riječi
Vibration; Output-only Modal Analysis; Experimental Modal Analysis; Frequency Domain Decomposition; Singular Values

Hrčak ID: 227491

URI
https://hrcak.srce.hr/227491

Posjeta: 129 *