Özet:

In this study, a free vibration analysis of the straight-course anchor plates in the stable fluid is partly immersed in the stable fluid. The analyses were carried out under two titles, the analyses of the plate in vacuum conditions and in moist state. In both analyses, the isogeometric NURBS concept was adopted; the isogeometric end-elements method (IGAFEM) was applied to determine the dynamic characteristics in vacuum conditions of the plate; the isogeometric limit-elements method (IGABEM) was preferred to determine the dynamic characteristics in wet condition. As the movement equation of the structure in vacuum conditions is created, Kirchhoff's thin plate theory has been adopted. In the wet analyses performed, the liquid was considered non-viscose and incompressible; the reversal movements of the liquid were ignored. It has been believed that the interaction between the fluid and the plaque occurs only through the pressure area in which the movements of the plaque occur in the fluid environment. The linear hydroelastisity theory has been adopted in order to determine the changes that occur in the dynamic characteristics of the plate as a result of the fluid-building interaction. The dynamic characteristics of the plaque obtained in vacuum and wet conditions (natural frequencies and corresponding mode shapes) are presented comparatively to the results obtained by analytical and experimental studies in the literature. When the results were examined, it was observed that the isogeometric NURBS concept could be effectively applied to fluid-building interaction problems.

Anahtar Kelimeler: