JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Bow Structure Design of the FPSO installed in the North Sea under the Flare Slamming Load
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Bow Structure Design of the FPSO installed in the North Sea under the Flare Slamming Load
Kim, Ul-Nyeon;
  PDF(new window)
 Abstract
This paper is about the bow structure design of the ship-typed and turret moored FPSO which is subjected to the bow-flare slamming load in harsh North Sea environments. Quad 204 FPSO project involves the redevelopment of the existing Schiehallion FPSO which is damaged by impact wave loads. Normally all offshore systems including FPSO are designed to withstand the 100 year storm I.e. the storm that happens once every hundred years at the location where the system is installed. Several incidents have revealed that impact loading is important issue for moored floating production systems. In this paper, the design impact loads are estimated considering the ship owner’s specification, measured data from model tests, requirements of the classification society rules and results of numerical simulation analyses. The impact pressure by numerical analysis is 1.8 times greater than required value by CSR adopted by IACS. Based on the selected design load, plastic design formulae allowing the local material yielding are applied for the initial scantling of the bow structure. To verify the structural integrity, FE analyses are carried out considering the local area subjected to the impact wave loads. Their results such as structural arrangement, design loads and scantlings are shown and discussed. It is found that plastic design formulae in adopting Initial design phase give sufficiently conservative results in terms of structural strength.
 Keywords
Bow flare impact;Slamming load;Structural integrity;Design load;Structural design and analysis;
 Language
Korean
 Cited by
 References
1.
Biggs, J.M., 1982. Introduction to Structural Dynamics. Mcgraw-hill Book Company: New York.

2.
Brizzolara, S. Couty, N. Hermundstad, O. loan, A. Kukkanen, T. Viviani, T. & Temarel, P., 2008. Comparison of Experimental and numerical loads on an impacting Bow Section. Ships and Offshore Structures, 3(4), pp.305-324. crossref(new window)

3.
CSR, 2010. Common Structural Rules for Double Hull Oil Tankers. IACS: London.

4.
DNV-OS-C102, 2008. Structural Design of Offshore. Det Norske Veritas: Oslo.

5.
FOIFL, 2008. Rules and Regulations for the Classification of a Floating Offshore Installation at a Fixed Location, Part 4 Steel Unit Structures Lloyd's Register. Lloyd's Register: London.

6.
Gorf, G. Barltrop, N. Okan, B. Hodgson, T. & Rainey, R., 2000. FPSO bow damage in steep waves. Proceedings of a Workshop Organized by Ifremer, Rogue Waves 2000, Brest, France, 29-30 November 2000, pp.37-46.

7.
Kim, P.Y. Park, J.S. & Kang, J.M., 2001. Development of a program for calculation of bow impact pressure and structural scantlings. Proceedings of the Annual Spring Meeting, SNAK, Koje, Republic of Korea, 19-20 April 2001, pp.271-274.

8.
Kim, Y.J. Shin, K.S. Shin, C.H. Kang, J.M. Kim, M.S. Kim, S.C. Oh, S.G. Rim, C.W. Kim,D.H. Kim, D.H. Park, I.H. Song, K.J. Lee, C.K. & Hang Y.H., 2003a. Prediction of Bow Flare Impact Pressure and Its Application to Ship Structure Design –Tanker and Bulk Carrier. Journal of the Society of Naval Architects of Korea, 40(3), pp.22-28.

9.
Kim, Y.J. Shin, K.S. Shin, C.H. Kang, J.M. Kim, M.S. Kim, S.C. Oh, S.G. Rim, C.W. Kim,D.H. Kim, D.H. Park, I.H. Song, K.J. Lee, C.K. & Hang Y.H., 2003b. Prediction of Bow Flare Impact Pressure and Its Application to Ship Structure Design – Container Ship and PCC. Journal of the Society of Naval Architects of Korea, 40(3), pp.29-36. crossref(new window)

10.
Lim, H.J. Lee, H.H. Park, S.H. & Rhee S.H., 2012. Experiments and Numerical Validation for FPSO Bow Water Shipping. Journal of the Society of Naval Architects of Korea, 49(1), pp.6-13. crossref(new window)

11.
SAFE-FLOW JIP/EU, 2004. Summary Report on Design Guidance and Assessment Methodologies for Wave Slam and Green Water Impact Loading. Report No. 15874-1-OE, EU Project No. GRD1-2000-25656: European Community. [Online] Available at : http://www.bsee.gov/Technology-and -Research/Technology-Assessment-Programs/Repor ts/400-499/420AA/ [Accessed 14 October 2015].

12.
Soares, G.C. Pascal, R. Antao, E.M. Voogt, A. J. & Buckner, B., 2004. An approach to calculate the probability of wave impact on an FPSO bow. Proceedings of OMAE04, Vancouver, Canada, 20-24 June 2004, pp.1-9.

13.
Voogt, A. & Buchner, B. 2004. Prediction of wave impact loads on ship-type offshore structures in steep fronted waves. Proceedings 14th International Offshore Polar Engineering Conference, Toulon, France, ISOPE, 23-28 May 2004, pp.350-358.

14.
Xu, L. & Barltrop, N. 2005. Wave slap loading on FPSO bows. HSE Books Research Report 324. Glasgow: University of Glasgow and Strathclyde.

15.
Yoon, M.C. Jang, Y.S. & Ryu, H.R., 2001. Improvement of container carrier forward structure under bow impact load. Proceedings of the Annual Spring Meeting, SNAK, Koje, April 2001 Republic of Korea, pp.267-270.