Browse > Article
http://dx.doi.org/10.12989/ose.2017.7.1.001

Dynamic response analysis of submerged floating tunnels by wave and seismic excitations  

Lee, Jooyoung (Department of Ocean Engineering, Texas A&M University)
Jin, Chungkuk (Department of Ocean Engineering, Texas A&M University)
Kim, Moohyun (Department of Ocean Engineering, Texas A&M University)
Publication Information
Ocean Systems Engineering / v.7, no.1, 2017 , pp. 1-19 More about this Journal
Abstract
This paper presents the numerical simulation results for the dynamic responses of two types of submerged floating tunnels (SFT) under wave and/or seismic excitations. Time domain simulations are conducted by the commercial program OrcaFlex (OF) and in-house CHARM3D program (CP). The dynamic performances of a short/rigid/free-end SFT section with vertical and inclined mooring lines are evaluated. The SFT numerical models were validated against Oh et al.'s (2013) model test results under regular wave conditions. Then the numerical models were further applied to the cases of irregular waves or seismic motions. The main results presented are SFT surge/heave motions and mooring tensions. The general trends and magnitudes obtained by the two different software packages reasonably agree to each other along with experimental results. When seabed seismic motions are applied to the SFT system, the dynamic responses of SFTs are small but dynamic mooring tension can significantly be amplified. In particular, horizontal earthquakes greatly increase the dynamic tension of the inclined mooring system, while vertical earthquakes cause similar effect on vertical mooring system.
Keywords
SFT (Submerged Floating Tunnel); dynamic responses; coupled dynamics; irregular waves; earthquake; line tensions; vertical/inclined mooring;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Chopra, Anil K. (2007), Dynamics of Structures: Theory and Applications to Earthquake Engineering, 4th Edition, Prentice Hall, New York, NY, USA.
2 Cifuentes, C., Kim, S., Kim, M.H. and Park, W.S. (2015), "Numerical simulation of the coupled dynamic response of a submerged floating tunnel with mooring lines in regular waves", Ocean Syst. Eng., 5(2), 109-123.   DOI
3 Dean, W.R. (1948), "On the reflection of surface waves by a submerged cylinder", Math. Proc. Cambridge Philosoph. Soc., 44(4), 483-491.   DOI
4 DeCew, J., Tsukrov, I., Risso, A., Swift, M.R. and Celikkol, B. (2010), "Modeling of dynamic behavior of a single-point moored submersible fish cage under currents", Aquac. Eng., 43(2), 38-45.   DOI
5 Di Pilato, M., Perotti, F. and Fogazzi, P. (2008), "3D dynamic response of submerged floating tunnels under seismic and hydrodynamic excitation", Eng. Struct., 30(1), 268-281.   DOI
6 Fogazzi, P. and Perotti, F. (2000), "The dynamic response of seabed anchored floating tunnels under seismic excitation", Earthq. Eng. Struct. Dyn., 29(3), 273-295   DOI
7 Garrett, D.L. (1982), "Dynamic analysis of slender rods", J. Energy Resour. Technol., 104(4), 302-306.   DOI
8 Kang, H.Y. and Kim, M.H. (2014), "Safety assessment of Caisson transport on a floating dock by frequency- and time-domain calculations", Ocean Syst. Eng., 4(2), 99-115.   DOI
9 Lee, J.H. Seo, S.I. and Mun, H.S. (2016), "Seismic behaviors of a floating submerged tunnel with a rectangular cross-section", Ocean Eng., 127, 32-47.   DOI
10 Long, X., Ge, F., Wang, L. and Hong, Y. (2009), "Effects of fundamental structure parameters on dynamic responses of submerged floating tunnel under hydrodynamic loads", Acta Mechanica Sinica, 25(3), 335-344.   DOI
11 Brancaleoni, F., Castellani, A. and D'asdia, P. (1989), "The response of submerged tunnels to their environment", Eng. Struct., 11(1), 47-56.   DOI
12 Chen, W. and Huang, G. (2010), "Seismic wave passage effect on dynamic response of submerged floating tunnels", Procedia Eng., 4, 217-224.   DOI
13 Maruo, H. (1957), "The excess resistance of a ship in rough seas", Int. Shipbuild. Prog., 4(35), 337-345.   DOI
14 Oh, S.H., Park, W.S., Jang, S.C., Kim, D.H. and Ahn, H.D. (2013), "Physical experiments on the hydrodynamic response of submerged floating tunnel against the wave action", APAC, 24-26.
15 Orcina, (2015), OrcaFlex Manual Version 9.8a, Orcina, Ulverston, Cumbria, UK.
16 Remseth, S., Leira, B.J., Okstad, K.M., Mathisen, K.M. and Haukas, T. (1999), "Dynamic response and fluid/structure interaction of submerged floating tunnels", Comput. Struct., 72(4), 659-685.   DOI
17 Wheeler, J.D. (1969), "Methods for calculating forces produced by irregular waves", Offshore Technology Conference, 359-367.
18 Yang, C.K. and Kim, M.H. (2010), "Linear and nonlinear approach of hydro-pneumatic tensioner modeling for spar global performance" J. Offshore Mech. Arctic Eng., 132(1), 011601.   DOI
19 Hyun, C.H., Yun, C.B. and Lee, D.G. (1992), "Nonstationary response analysis of a suspension bridge for multiple support excitations", Prob. Eng. Mech., 7(1), 27-35.   DOI