We used array-based ambient vibration modal analysis and eigenfrequency modeling to characterize the dynamic behavior and structural conditions of a partly collapsed lava tube roof. Multiple resonance modes were identified from spectral and cross-correlation analyses, and used to calibrate a heterogeneous numerical model of the lava tube. Our study shows that the combination of experimental and numerical modal analysis is a valuable tool for mapping and structural characterization of underground cavity roofs.
Modal analysis of a lava tube roof complex. Tabernacle Hill, Utah, USA / Grechi, G.; Moore, J. R.; Jensen, E. K.; Mccreary, M. E.; Czech, T. L.; Festin, M. M.. - In: ROCK MECHANICS AND ROCK ENGINEERING. - ISSN 0723-2632. - 57:(2024), pp. 1-10. [10.1007/s00603-024-03868-9]
Modal analysis of a lava tube roof complex. Tabernacle Hill, Utah, USA
Grechi G.
Primo
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2024
Abstract
We used array-based ambient vibration modal analysis and eigenfrequency modeling to characterize the dynamic behavior and structural conditions of a partly collapsed lava tube roof. Multiple resonance modes were identified from spectral and cross-correlation analyses, and used to calibrate a heterogeneous numerical model of the lava tube. Our study shows that the combination of experimental and numerical modal analysis is a valuable tool for mapping and structural characterization of underground cavity roofs.| File | Dimensione | Formato | |
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Grechi_Modal_2024.pdf
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