Nonlinear Dynamic Behaviors of Offshore Guyed Towers

해양구조물 Guyed Tower의 비선형 동적거동

  • 박우선 (한국해양연구소 해양공학연구실) ;
  • 편종근 (명지대학교 토목공학과) ;
  • 박영석 (명지대학교 토목공학과)
  • Published : 1991.09.01

Abstract

This study is concerned with the nonlinear dynamic behaviors of guyed towers for wave loadings. In order to analyze the nonlinear responses of guyed towers efficiently, the main tower is modeled as an equivalent stick, the guyline system is idealized as a spring with nonlinear stiffness in the horizontal direction. and the pile foundation system is represented as a linear spring in the rotational direction. The wave forces on the main tower are evaluated by using Morison's equation. In order to consider adequately the nonlinearities of the guying system and drag forces due to fluid viscosity. the analyses are performed in the time domain. The mode superposition method is adopted for solving the nonlinear equation of motion efficiently. which is based on the Newmark integration scheme. Numerical analyses are carried out to investigate the sensitivity of two major design parameters for guyed towers. i.e., the clump weight conditions and the base renditions of the tower.

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