A Study on Vibration Characteristic of Stiffened Plates with Fluid Coupling Effect inside a Tank

탱크 내부 유체 연성 효과에 의한 보강판의 진동 특성 연구

  • 정우인 (한진중티엠에스 기본연구팀) ;
  • 권종현 (한진중티엠에스 기본연구팀) ;
  • 김문수 (한진중티엠에스 기본연구팀)
  • Published : 2015.09.30

Abstract

In ship structure, many parts are in contact with inner or outer fluid as stern, ballast and oil tanks. Fatigue damages are sometimes observed in these tanks which seem to be caused by resonance with exciting force of engine and propeller. Vibration characteristics of these tanks in contact with fluid are significantly affected by fluid coupling effect. Therefore it is important to exactly predict vibration characteristics of tank structure. In order to estimate the vibration characteristics, the fluid-structure interaction(FSI) problem should be solved precisely. But it is difficult to estimate exactly the magnitude of the fluid coupling effect because it has some problems such as a fluid-structure interaction, influence by the free surface, vibration modes of structural panels and depth of water. In this paper, with fluid coupling effect, the effect of structural constraint between panels on the vibration characteristics are investigated numerically and discussed.

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