Ocean Systems Engineering

  • 제7권1호
  • /
  • Pages.1-19
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  • 2017
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  • 2093-6702(pISSN)
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  • 2093-677X(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

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)
  • 투고 : 2016.12.29
  • 심사 : 2017.02.05
  • 발행 : 2017.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

참고문헌

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피인용 문헌

  1. Time-Domain Hydro-Elastic Analysis of a SFT (Submerged Floating Tunnel) with Mooring Lines under Extreme Wave and Seismic Excitations vol.8, pp.12, 2018, https://doi.org/10.3390/app8122386
  2. Dynamic and structural responses of a submerged floating tunnel under extreme wave conditions vol.7, pp.4, 2017, https://doi.org/10.12989/ose.2017.7.4.413
  3. Seismic responses of a metro tunnel in a ground fissure site vol.15, pp.2, 2017, https://doi.org/10.12989/gae.2018.15.2.775
  4. Downtime cost analysis of offloading operations under irregular waves in Malaysian waters vol.10, pp.2, 2017, https://doi.org/10.12989/ose.2020.10.2.131
  5. Time-domain coupled dynamic simulation for SFT-mooring-train interaction in waves and earthquakes vol.75, pp.None, 2017, https://doi.org/10.1016/j.marstruc.2020.102883
  6. A Study on the Dynamic Behavior of a Vertical Tunnel Shaft Embedded in Liquefiable Ground during Earthquakes vol.11, pp.4, 2021, https://doi.org/10.3390/app11041560
  7. Optimization of tuned mass damper for seismic control of submerged floating tunnel vol.241, pp.None, 2017, https://doi.org/10.1016/j.engstruct.2021.112460