Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Improvement of Criteria for Mooring Safety Assessment in Single Point Mooring

  • Lee, Sang-Won (Graduate School, Korea Maritime and Ocean University) ;
  • Kim, Young-Du (Maritime Policy Research Office, Korea Ship Safety Technology Authority)
  • Received : 2019.05.03
  • Accepted : 2019.05.28
  • Published : 2019.05.31
Download PDF
⟨ Previous Next ⟩

Abstract

The recent increase in crude oil trading has led to an increase in the workings of SPM for crude oil carriers. VLCCs generally encounter difficulty entering port due to limitations in terms of sea depth and maneuverability. The SPM is a system that allows mooring to the buoy located in the outer sea for such vessels. However, the buoy is more affected by relatively external forces because of their of shore location. Therefore, the safety assessment of SPM is particularly important as it can lead to large oil pollution disasters in the event of SPM accidents. Despite this, in the implementation of the Marine Traffic Safety Audit Scheme in Korea, there exists no guidance for SPM. In this study, a SPM mooring safety assessment is performed using OPTIMOOR, a numerical analysis program, so as to understand the mooring characteristics of SPM. As a result, it is confirmed that the tension of mooring lines and hull movement in the SPM are greatly affected by the encounter angles with external forces. In addition, it is found that the maximum tension of the mooring line is elevated as the water depth becomes shallower through sensitivity analysis. According to SPM characteristics, which has a large influence on the encounter angle, this study has proposed an amendment to setting criteria in the implementation of the Maritime Traffic Safety Audit Scheme which could improve the reliability and accuracy of mooring safety assessments.

Keywords

References

  1. Cho, I. S.(2011), A Study on the Present Status and Future Directions of Maritime Safety Audit, Journal of the Korean Society of Marine Environment & Safety, Vol. 17, No. 4, pp. 399-405. https://doi.org/10.7837/kosomes.2011.17.4.399
  2. Cho, I. S.(2017), Behavior Analysis and Control of a Moored Training Ship in an Exclusive Wharf, Journal of the Korean Society of Marine Environment & Safety, Vol. 23, No. 2, pp. 139-145. https://doi.org/10.7837/kosomes.2017.23.2.139
  3. Cho, I. S. and K. M. Cho(2013), A Study on the Improvement of Maritime Traffic Safety Assessment Scheme by applying Metaevaluation Model, Journal of Korean Navigation and Port Research, Vol. 37, No. 4, pp. 383-390. https://doi.org/10.5394/KINPR.2013.37.4.383
  4. Davenport, A. G.(1961), The Spectrum of Horizontal Gustiness near the Ground in High Winds, Quarterly Journal Royal Meteorological Society, Vol. 87, pp. 194-211. https://doi.org/10.1002/qj.49708737208
  5. Jiang, T., T. E. Schellin and S. D. Sharma(1995), Horizontal Motions of an SPM Tanker Under Alternative Mooring Configurations, Journal of Offshore Mechanics and Arctic Engineering, Vol. 117, No. 4, pp. 223-231. https://doi.org/10.1115/1.2827227
  6. John, F. F., S. P. Banfield and A. Ractliffe(1998), Computer Mooring Load Analysis to Improve Port Operations and Safety, Proceedings of American Society of Civil Engineers.
  7. Jun, S. Y., Y. M. Kim, B. G. Woo and H. Chung(2008), A Systematic Approach to Decide Maximum Berthing Ship Size Coupled with Berth Design Criteria, Journal of the Korean Society of Marine Environment & Safety, Vol. 14, No. 1, pp. 45-54.
  8. Kang, W. S. and Y. S. Park(2016), A Basic Study on Safe Mooring Guide for Dangerous Goods Berths in Ul-San Port, Journal of the Korean Society of Marine Environment & Safety, Vol. 22, No. 1, pp. 67-73. https://doi.org/10.7837/kosomes.2016.22.1.067
  9. Kim, I. C.(2016), A Study on Adopting an Ex Post Facto Management System and Reforming the Maritime Traffic Safety Audit Scheme, Journal of the Korean Society of Marine Environment & Safety, Vol. 22, No. 7, pp. 807-813. https://doi.org/10.7837/kosomes.2016.22.7.807
  10. Kim, J. S., J. Y. Jong and K. T. Kim(2005), A Study on the Maneuvering Area of Ship in Moving at Single Point Mooring, Journal of the Korean Society of Marine Environment & Safety, Vol. 11, No. 2, pp. 19-25.
  11. Kim, S. Y., J. S. Kim, Y. D. Kim and Y. S. Lee(2016), A Study to Improve the Operation Criteria by Size of Ship in Ulsan Tank Terminal, Journal of the Korean Society of Marine Environment & Safety, Vol. 22, No. 6, pp. 639-646. https://doi.org/10.7837/kosomes.2016.22.6.639
  12. Kim, Y. D.(2015), A Study on the Improvement Strategy of Specialized Institution for Efficient Operations of Maritime Traffic Safety Audit Scheme, Journal of the Korean Society of Marine Environment & Safety, Vol. 21, No. 1, pp. 018-024. https://doi.org/10.7837/kosomes.2015.21.1.018
  13. Lee, S. K. and D. H. Kang(2003), A Study on the Control of the Slew Motion of a Single Point Moored Ship, Journal of Korean Navigation and Port Research, Vol. 27, No. 2, pp. 193-198. https://doi.org/10.5394/KINPR.2003.27.2.193
  14. Lee, S. K., H. J. Jo and D. H. Kang(2003), A Study on the Motion of a Single Point Moored Ship in Irregular Waves, Journal of Korean Navigation and Port Research, Vol. 27, No. 1, pp. 55-61. https://doi.org/10.5394/KINPR.2003.27.1.055
  15. OCIMF(2015), Oil Companies International Marine Forum, Single Point Mooring Maintenance and Operations Guide 3rd edition, p. 104.
  16. OCIMF(2018), Oil Companies International Marine Forum, Mooring Equipment Guidelines 4th edition, p. 312.
  17. Pierson, W. J. and L. Moskowitz(1964), A Proposed Spectral Form for Fully Developed Wind Seas Based on the Similarity Theory of SA Kitaigorodskii, Journal of Geophysical Research, Vol. 69, No. 24, pp. 5181-5190. https://doi.org/10.1029/JZ069i024p05181
  18. Ractliffe, A. T., P. J. Fisher and G. H. G. Mitchell(1981), An Experimental Study of the Parameters Affecting the Drag of Barges in Current and Waves, Offshore Technology Conference, No. 4166, pp. 495-503.
  19. Redondo, L., R. Mendez and L. Perez-Rojas(2016), An Indirect Method Implementing Effect of the Wind on Moored Ship Experimental Tests, Ocean Engineering, Vol. 121, pp. 341-355. https://doi.org/10.1016/j.oceaneng.2016.05.001
  20. Yun, G. H. and J. M. Park(2013), A Study on the Standard for Proper Position Rating Through Analysis of SBM Installation cases at home and abroad, Journal of Korean Navigation and Port Research, Vol. 37, No. 4, pp. 351-357. https://doi.org/10.5394/KINPR.2013.37.4.351

Cited by

  1. Identification of Impact Factors in Ship-to-Ship Mooring Through Sensitivity Analysis vol.43, pp.5, 2019, https://doi.org/10.5394/kinpr.2019.43.5.310