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Collision Analysis of Submerged Floating Tunnel by Underwater Navigating Vessel

수중운항체에 대한 해중터널의 충돌해석

  • Hong, Kwan-Young (Division of Ocean System Engineering, Mokpo National Maritime Univ.) ;
  • Lee, Gye-Hee (Division of Ocean System Engineering, Mokpo National Maritime Univ.)
  • 홍관영 (목포해양대학교 해양.플랜트건설공학과) ;
  • 이계희 (목포해양대학교 해양.플랜트건설공학과)
  • Received : 2014.04.28
  • Accepted : 2014.06.19
  • Published : 2014.10.31

Abstract

In this paper, to recognize the collision behavior between a submerged floating tunnel(SFT) and underwater navigation vessel(UNV), both structures are modeled and analyzed. The SFT of collision point is modeled tubular section using concrete with steel lining. The other part of SFT is modeled elastic beam elements. Mooring lines are modeled as cable elements with tension. The under water navigation vessel is assumed 1800DT submarine and its total mass at collision is obtained with hydrodynamic added mass. The buoyancy force on SFT is included in initial condition using dynamic relaxation method. The buoyancy ratio (B/W) and the collision speed are considered as the collision conditions. As results, energy dissipation is concentrated on the SFT and that of the UNV is minor. Additionally, the collision behaviors are greatly affected by B/W and the tension of mooring lines. Especially, the collision forces are shown different tendency compare to vessel collision force of current design code.

Acknowledgement

Supported by : 한국연구재단

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