DOI QR코드

DOI QR Code

A Study on the Weld-induced Residual Stress Analysis at FPSO Moon Pool Structure

FPSO Moon Pool 구조에서 발생되는 용접 잔류응력에 관한 연구

  • Lee, Joo-Sung (School of Naval Architecture & Ocean Engineering, University of Ulsan) ;
  • Han, Sung-Woo (School of Naval Architecture & Ocean Engineering, University of Ulsan) ;
  • Lee, Sang-Hoon (School of Naval Architecture & Ocean Engineering, University of Ulsan) ;
  • Kim, Sang-Il (Lloyd's Register Asia)
  • 이주성 (울산대학교 조선해양공학부) ;
  • 한성우 (울산대학교 조선해양공학부) ;
  • 이상훈 (울산대학교 조선해양공학부) ;
  • 김상일 (로이드선급 아시아)
  • Received : 2011.03.08
  • Accepted : 2011.06.20
  • Published : 2011.06.30

Abstract

Welding process generates distortion and residual stress in the weldment due to rapid heating and cooling. Welding distortion and residual stress in the welded structure result in many troubles such as dimensional inaccuracies in assembling and safety problem during service. The accurate prediction of welding residual stress is thus very important to improve the quality of weldment and find the way to reduce itself. This paper presents the simulation of welding-induced residual stress analysis to examine the cause of cracking in the SUS-overlay welding specimen at FPSO Moon Pool structure.

Keywords

References

  1. K. Masubuchi : Analysis of Welded Structures, Pergamon Press, Oxford, 1980
  2. H.B. Cary : Modern Welding Technology, 4th Edition, Upper Saddle River, New Jersey, 1997
  3. Sang Il Kim : Development of welding deformation control method for hull structure, Ph. D Thesis, University of Ulsan, Republic of Korea, 1999 (in Korean)
  4. Jin Tae Lee : Study of the influence of increasing productivity through the implementation of the grand block unit system in ship construction, Ph. D Thesis, University of Ulsan, Republic of Korea, 2010 (in Korean)
  5. H.W. Lee, S.W. Kang : A study on transverse weld cracks in 50mm thick steel plate with SAW process, Welding research abroad, 44-2 (1998), 7-17
  6. Taik Soon Lee, Dae Sek Oh, Hwi Won Lee : The characteristics of near - threshold fatigue crack propagation for welding zone in TMCP high strength steels, Journal of ocean engineering and technology, 11-3 (1997) 39-47 (in Korean)
  7. H.S. Yu, Y.S. Chang, B.G. Ahn, S.H. Chung : A study on effect of PWHT in AH36-TMCP steel, Journal of KWS, 16-6 (1998), 44-51 (in Korean)
  8. Chang Doo Jang, Seung il Seo : Calculation of residual stresses by thermal elasto-plastic analysis, Journal of KWS, 6-4 (1988), 35-43 (in Korean)
  9. Sung Woo Han : A Study on the thermal deformation characteristics a thin panels according to the type of a stiffener, Master's Thesis, University of Ulsan, Republic of Korea, 2009 (in Korean)