Finite Element Steady-State Vibration Analysis Considering Frequency-Dependent Soil-Pile Interactionopen access
- Authors
- Song, Seung-Han; Lee, Sean Seung won
- Issue Date
- Dec-2019
- Publisher
- MDPI
- Keywords
- FEM (Finite Element Method); DYNA6; soil-structure interaction; soil-pile dynamic stiffness
- Citation
- APPLIED SCIENCES-BASEL, v.9, no.24, pp.1 - 12
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED SCIENCES-BASEL
- Volume
- 9
- Number
- 24
- Start Page
- 1
- End Page
- 12
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/146684
- DOI
- 10.3390/app9245371
- ISSN
- 2076-3417
- Abstract
- The vibration response of equipment foundation structures is not only affected by the structural stiffness and mass, but also greatly influenced by the degree of a soil-foundation structural interaction. Furthermore, the vibratory performance of equipment foundation structures supported by pile systems largely depends on the soil-pile dynamic stiffness and damping, which are variable in nature within the speed range that machines operate at. This paper reviews a method for evaluating effective soil-pile stiffness and damping that can be computed by Novak's method or by commercial software (DYNA6, University of Western Ontario). A series of Finite Element (FE) time history and steady-state analyses using SAP2000 have been performed to examine the effects of dynamic soil-pile-foundation interaction on the vibration performance of equipment foundations, such as large compressor foundations and steam/gas turbine foundations. Frequency-dependent stiffness is estimated to be higher than frequency-independent stiffness, in general, and, thus, affects the vibration calculation. This paper provides a full-spectrum steady-state vibration solution, which increases the reliability of the foundation's structural design.
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