Dynamic Response Analysis of Tension Leg Platforms in Multi-directional Irregular Waves (Frequency Domain Analysis)

다방향 불규칙파중의 TLP의 동적응답해석 (주파수영역 해석)

  • 구자삼 (부산수산대학교, 선박공학과) ;
  • 조효제 (부산수산대학교, 선박공학과) ;
  • 이창호 (부산수산대학교 공과대학 선박공학과)
  • Published : 1994.06.01

Abstract

A numerical procedure is described for simultaneously predicting the motion and structural responses of tension leg platforms (TLPs) in multi-directional irregular waves. The developed numerical approach is based on a combination of a three dimensional source distribution method, the finite element method for structurally treating the space frame elements and a spectral analysis technique of directional waves. The spectral description for the linear responses of a structure in the frequency domain is sufficient to completely define the responses. This is because both the wave inputs and the responses are stationary Gaussian ran dom process of which the statistical properties in the amplitude domain are well known. The hydrodynamic interactions among TLP members, such as columns and pontoons, are included in the motion and structural analysis. The effect of wave directionality has been pointed out on the first order motion, tether forces and structural responses of a TLP in multi-directional irregular waves.

Keywords

References

  1. OMAE Short-crested Wave Forces on a Vertical Pile Isaacson,M.;Nwogu,O.
  2. OMAE Wave Loads on a Cylinder in 2-D and 3-D Deep Water Waves Aage,C.(et al.)
  3. PRADA Effects of Directional Waves on the Behaviour of Semisubmersible Rigs Jo,H.J.;Maeda,H.;Miyajima,S.
  4. OMAE Influence of Wave Directionality on Response of Semisubmersible Sand,S.E.;Romeling,J.;Kirkegaard,J.
  5. 日本造船學會論文集 no.165 方向スペクトル波中にける海洋構造物の應答一の1線形一次應答一 竹澤誠二;小林頭太郞
  6. SPIE Effects of Directional Waves on the Low-frequency Motions of Moored Floating Structures Maeda,H.;Jo,H.J.;Miyajima,S.
  7. OTC v.5629 The Influence of Directional Spreading of Waves on Mooring Forces Pinkster,J.A.
  8. 日本造船學會論文集 no.166 方向スペクトル波中にける海洋構造物の應答一の1非線形應答 竹澤誠二;小林頭太郞
  9. 한국해양공학회지 v.7 no.1 인장 계류식 해양구조물의 동적응답해석법의 개발 구자삼;이창호;홍봉기
  10. 日本造船學會誌 no.740 海洋波の方向波スペクトルについ 高石敬史;その他
  11. 不規則現象論 山內保文
  12. Probabilistic Theory of Ship Dynamics Price,W.G.;Bishop,R.E.D.