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Structural Engineering and Mechanics Volume 57, Number 5, March10 2016 , pages 921-936 DOI: https://doi.org/10.12989/sem.2016.57.5.921 |
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Transient response analysis by model order reduction of a Mokpo-Jeju submerged floating tunnel under seismic excitations |
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Jeong Sam Han, Boreum Won, Woo-Sun Park and Jin Hwan Ko
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| Abstract | ||
| In this study, a model order reduction technique is applied to solve the transient responses of submerged floating tunnel (SFT) from Mokpo to Jeju under seismic excitations. Because the SFT is a very long structure as well as a transient response analysis requires large amount of computational resources, the model order reduction is mandatory in the design stage of the SFT. Thus, we apply a model order reduction based on Krylov subspace to the simplified finite element model of the SFT. The responses of the reduced order model are compared with those of the full order model and also are verified by referring a previous work. In conclusion, the computational resources are dramatically reduced with an acceptable accuracy by using the model order reduction, which eventually is useful for designing the full-scale model of SFTs. | ||
| Key Words | ||
| computational mechanics; dynamic analysis; earthquake/seismic ananysis; finite element method (FEM); numerical methods; offshore/coastal structures; simulation; structural design | ||
| Address | ||
| Boreum Won, Woo-Sun Park and Jin Hwan Ko: 1Coastal Engineering Research Division, Korea Institute of Ocean Science and Technology, Korea Jeong Sam Han: 2Department of Mechanical Design Engineering, Andong National University, Korea | ||