Transactions of the Korean Society of Pressure Vessels and Piping (한국압력기기공학회 논문집)

Korean Society of Pressure Vessels and Piping (한국압력기기공학회)
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Investigating the Subsea Sandwich Pipeline Integrity under Complex Loadings

선형 매칭 기법을 활용한 해저 샌드위치 파이프의 복합하중 영향도 분석

  • 박거락 (서울과학기술대학교 MSDE학과) ;
  • 송규 (서울과학기술대학교 MSDE학과) ;
  • 최영재 (서울과학기술대학교 MSDE학과) ;
  • 조락균 (서울과학기술대학교 MSDE학과) ;
  • 김충수 (한국생산기술연구원 첨단정형공정그룹)
  • Received : 2021.11.19
  • Accepted : 2021.12.23
  • Published : 2021.12.31
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Abstract

Subsea pipelines are widely used to transport hydrocarbons from ultra-deep seawater to facilities on the coast. A sandwich pipe is a pipe-in-pipe system in which the annulus between the two concentric steel pipes is filled with polymer cores and fillers for insulation and structural reinforcement. Sandwich pipeline is always exposed to complex loading such as bending moment, bulking, internal and external pressures caused by installation, operation and environmental factors. This research provides insights into the structural integrity of sandwich pipeline exposed to complex loading conditions using a linear matching method (LMM). The finite element model of the sandwich pipeline has been generated from previous research, and the model validation is performed by comparing the results of the linear analysis between the two models. The temperature dependent material properties are used to simulate the behavior of real pipeline, and the elastic-perfectly plastic (EPP) model has been taken into account for the material non-linearity. Numerical results provide comprehensive insights into the structural response of the sandwich pipeline under monotonic and cyclic loading and provide notable points about the evaluation of the plastic collapse limit and the elastic shakedown limit of the sandwich pipeline.

Keywords

Acknowledgement

이 연구는 2021년 대한기계학회 신뢰성부문 춘계학술대회에 발표된 연구내용을 바탕으로 추가적인 반복 하중 조건에 대한 탄성 셰이크다운 해석을 수행하여 작성되었습니다.

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