In this paper, for a seismic analysis of an offshore subsea manifold, Response Spectrum Analysis(RSA) and Time History Analysis(THA) were conducted under a various analysis conditions. Response spectrum and seismic design procedure have followed ISO19901-2 code. In case of THA, The response spectrum were converted into artificial earthquake history and both of Explicit and Implicit solvers were used to examine the characteristics of seismic analysis. For the verification, Various seismic analysis methods were applied on a single degree of freedom beam model and a simplified model of the actual manifold. The difference between the results of RSA and THA on the simplified manyfold model evaluated for the analysis of the actual manifold. Because THA is impossible in case of real complex structure such as a manifold, Safety of the actual manifold structure was accessed by using the RSA and the difference between the results of RSA and THA from the simplified model.

Abstract
 1. 서 론
 2. 내진해석방법
  2.1 응답스펙트럼 해석법(RSA)
  2.2 시간이력 해석법(THA)
  2.3 적용 내진 해석 방법
 3. 해석용 입력지진의 결정
  3.1 ISO 기반 응답스펙트럼 결정
  3.2 QuakeSim 인공지진파 생성
 4. 단자유도 모델을 통한 해석방법 검증
  4.1 단자유도 보요소 모델과 해석 조건
  4.2 단자유도 보요소 모델 해석결과
 5. 해양플랜트용 매니폴드 단순모델 내진해석 검증
  5.1 해양플랜트 구조물의 해석 모델
  5.2 모드해석 및 응답스펙트럼해석
  5.3 시간이력 해석
  5.4 해석결과 비교
 6. 실제 해양플랜트 매니폴드 모델 해석
  6.1 해석 모델 및 조건
  6.2 해석결과
 7. 수중 구조물과 유체 유동의 상호작용 효과
  7.1 모리슨방정식
  7.2 유체 부가질량에 의한 강도 평가
 8. 결 론
 References
 요 지

• 이은호(과학기술연합대학원대학교 생산기술전공(산업소재 및 스마트제조공학과)) | Eun-Ho Lee (Industrial Technology(Industrial Materials and Smart Manufacturing Engineering), Korea University of Science and Technology(UST))
• 곽시영(과학기술연합대학원대학교 생산기술전공(산업소재 및 스마트제조공학과), 한국생산기술연구원 디지털제조공정그룹) | Si-Young Kwak (Industrial Technology(Industrial Materials and Smart Manufacturing Engineering), Korea University of Science and Technology(UST), Digital Manufacturing Process Group, Korea Institute of Industrial Technology(KITECH)) Corresponding author