Identification of Viscoelastic Property of Pile-Soil Interactions with Fractional Derivative Model
| Autor: | Wael Zatar, Feng Xiao, Gang S. Chen, J. Leroy Hulsey |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Journal of Low Frequency Noise, Vibration and Active Control, Vol 40 (2021) |
| Druh dokumentu: | article |
| ISSN: | 1461-3484 2048-4046 14613484 |
| DOI: | 10.1177/1461348420979478 |
| Popis: | The viscoelastic property of pile-soil interactions is modeled by fractional derivative method and is used to characterize the structural dynamics of pile and rheological behavior of a thawing frozen soil. A study of the thawing frozen soil impacts on pile structure’s dynamic characteristic is carried out. The frequency spectrum analysis and empirical modal decomposition are used to identify the pile structure dynamic properties. The rocking mode vibration in which pile behaviors like rigid body supported by viscoelastic soil is extracted to capture the viscoelastic property of pile-soil interactions. The rocking mode exhibiting time-varying frequency features is modeled with fractional derivative model and the fractional derivative order is identified. This study proposes a quick and reliable method to identify the viscoelastic property of pile-soil interactions. |
| Databáze: | Directory of Open Access Journals |
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