Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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A Review on Practical Use of Simple Analysis Method based on SDOF Model for the Stiffened Plate Structures subjected to Blast Loads

폭발하중을 받는 보강판 구조물의 간이 해석법에 대한 실용성 검토

  • Kim, Ul-Nyeon (Hyundai Maritime Research Institute, Hyundai Heavy Industries Co., Ltd.) ;
  • Ha, Simsik (Offshore & Industrial Plant Engineering Business Unit, Hyundai Heavy Industries Co., Ltd.)
  • 김을년 (현대중공업 선박연구소) ;
  • 하심식 (현대중공업 해양플랜트사업부)
  • Received : 2019.10.07
  • Accepted : 2020.01.29
  • Published : 2020.04.20
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Abstract

The offshore installation units may be subjected to various accidental loads such as collision from supply vessels, impact from dropped objects, blast load from gas explosion and thermal load from fire. This paper deals with the design and strength evaluation method of the stiffened plate structures in response to a blast load caused by a gas explosion accident. It is a comprehensive review of various items used in actual project such as the size and type of the explosive loads, general design procedure/concept and analysis method. The structural analyses using simple analysis methods based on SDOF model and nonlinear finite element analysis are applied to the particular FPSO project. Also validation studies on the design guidance given by simple analysis method based on SDOF model have also considered several items such as backpressure effects, material behavior and duration time of the overpressure. A good correlation between the prediction made by simple analysis method based on SDOF model and nonlinear finite element analysis can be generally obtained up to the elastic limit.

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References

  1. American Petroleum Institute(API), 2012. Recommended Practice for the Design of Offshore Facilities against Fire and Blast Loading. API-RP-2FB, USA, Washington:API.
  2. Biggs, John M., 1982. Introduction to structural dynamics. McGraw-Hill Book Company.
  3. Bureau Veritas(BV), 2019. Rules for the classification of offshore units, Rule Note NR 445.B2 DT R05E, Pt. B, Ch.3, Sec 9.
  4. DNVGL, 2019a. Structural design against accidental loads, recommended practice, DNVGL-RP-C204. [Online] (Update September 2019) Available at : http://www.dnvgl.com/ [Accessed November 2019].
  5. DNVGL, 2019b. Safety principles and arrangements, offshore standard, DNVGL-OS-A101. [Online] (Update July 2019) Available at : http://www.dnvgl.com/ [Accessed November 2019].
  6. Fire and Blast Information Group(FABIG), 1996. Technical note and worked examples to supplement the interim guidance notes for the design and protection of topside structures against explosion and fire, explosion resistant design of offshore structures-technical note 4. United Kingdom Berkshire:FABIG.
  7. Kim, B.J., et al., 2011. A parametric study on explosion impact response factors characteristics of offshore installation's corrugated blast wall. Journal of Korean Society of Ocean Engineering, 26(3), pp.46-54.
  8. Kim, S.J. et al., 2014. Dynamic structural response characteristics of stiffened blast wall under explosion loads. Journal of Society of Naval Architects of Korea, 51(5), pp.380-387. https://doi.org/10.3744/SNAK.2014.51.5.380
  9. Kim, U.N. & Kim, H.B., 2019. A study on the design concept and simplified analysis method in dropped object accidents by lifting crane. Journal of Society of Naval Architects of Korea, 56(3), pp.261-262.
  10. LSTC, 2012. LS-DYNA Keyword User's Manual Version 971 R6.1.0, Livermore Software Technology Corp., USA.
  11. NORSOK Standard, 2004. Design of steel structures, Rev.2, Standard N-004, Norway Lysaker:Standards Norway.
  12. Sabatino Ditali, Fulvio Ragno, Roberto Fiore, Jumriani, 2018. Simplified criteria for the application of blast loads from accidental explosions in plant design. Journal of Chemical Engineering Transactions, AIDIC, 67, pp.187-192.
  13. Simulia, 2014. ABAQUS ver. 6.14, Analysis User's Manual, HTML Vol. 1,2,3, Hibbitt Karlsson and Sorensen Inc.