Numerical Modeling of Stalagmite Vibrations
| Autor: | Götz Bokelmann, Sofi Esterhazy, Katalin Gribovszki |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Earthquake
0211 other engineering and technologies Numerical modeling Stalagmite 02 engineering and technology 010502 geochemistry & geophysics 01 natural sciences palaeoearthquake Geochemistry and Petrology stalagmite 0105 earth and related environmental sciences eigenfrequency 021110 strategic defence & security studies geography geography.geographical_feature_category Life span Oscillation seismic hazard Geophysics Finite element method Vibration Seismic hazard finite elements Geology asymmetry |
| Popis: | Recently, it has been argued that natural, intact stalagmites in caves give important constraints on seismic hazard since they have survived all earthquakes over their (rather long) life span. This suggests that the pattern of oscillation should be fully understood, including the splitting of eigenfrequencies that has occurred in recent cave observations. In the present study, we simulate the oscillation of a given stalagmite by setting up four simplified models of the stalagmite. The dimensions of the intact stalagmite were measured in situ, and the geo-mechanical and elastic parameters of broken stalagmite samples, determined in geo-mechanical laboratory, have been taken into account. The eigenfrequencies of the stalagmite are then calculated numerically, by the finite element method, and compared with the measured in situ values. The latter have shown splitting of eigenfrequencies, which we were able to reproduce by the numerical model calculations taking into account the asymmetric shape of the stalagmite. |
| Databáze: | OpenAIRE |
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