Motion Characteristics of FLNG Systems under the Effect of Drift Motions of Two Floating Bodies

Authors

  • Qiao Li Department of Marine System Engineering, Osaka Prefecture University, Sakai, Japan
  • Kohei Sugata Department of Marine System Engineering, Osaka Prefecture University, Sakai, Japan
  • Yasunori Nihei Department of Marine System Engineering, Osaka Prefecture University, Sakai, Japan
  • Yoshiho Ikeda Department of Marine System Engineering, Osaka Prefecture University, Sakai, Japan

DOI:

https://doi.org/10.11113/jt.v66.2475

Keywords:

LNG FPSO, shuttle LNG tanker, drift motion, mooring, tandem condition

Abstract

In recent years, some small and midsize gas fields are being developed all over the world, and FLNG systems which include LNG FPSO and shuttle LNG tank are going to be used. In rough sea, when produced LNG is offloaded from the FPSO to the shuttle tanker, two ships will be moored. In this study, we are focusing on characteristics of FLNG systems in waves and wind. Experimental studies were performedto observe motion of two floating bodies in tandem condition in regular waves. In the tank test, we observed drastic yawing and drift motions of a shuttle LNG tanker. These phenomena might be a threatto the safety of a FLNG system. In this paper, we will reveal a cause of these phenomena and evaluate a FLNG system by using a simple method.

References

Newman, J. N. 1967. The Drift Force and Moment on Ships in Waves. Journal of Ship reseach. 11(1).

Maruo, H. 1960.The Drift of a Body Floating on Waves. Journal of Ship Reseach. 4.

Yasunori Nihei, Takeshi Kinoshita, WeiguangBao. 2008. Nonlinear Hydrodynamic Forces on an Oscillating Floating Body in Waves-Report 1–Journal of the Japan Society of Naval Architects and Ocean Engineers. 225–237. (In Japanese).

ThekansaiSocietyof Naval Architects. 1983. Zosen sekkeibinran. 943. (In Japanese)

NaonosukeTakarada, Jun Obokata. 1979. On the Horizontal Slow Oscillation of Ships Moored to Single Point Moorings. Journal of Naval Architects of Japan. 595: 20–28. (In Japanese).

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Published

2014-01-01

Issue

Vol. 66 No. 2: Special Edition on Marine Technology

Section

Science and Engineering

License

Copyright of articles that appear in Jurnal Teknologi belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions, or any other reproductions of similar nature.

How to Cite

Motion Characteristics of FLNG Systems under the Effect of Drift Motions of Two Floating Bodies. (2014). Jurnal Teknologi (Sciences & Engineering), 66(2). https://doi.org/10.11113/jt.v66.2475