Modelling and Structural Analysis of Ice Strengthened Vessel

Ozgur Ozguc

Abstract

Abstract In this paper, one global and one local FE-model are developed in order to calculate the response of ice loading on an ice strengthened 100.000 DWT oil carrier. A global analysis is performed by applying loads in two different areas in the bow region. The deformations of the global model are used as boundary conditions in the analysis of the local model. In each of the two areas, the loads are applied as stiffener loads (symmetrically around a longitudinal stiffener) and as plate loads (between two stiffeners). The longitudinal extension of the loads is one and two frame spacings. Further, eight different load cases are investigated. Membrane stresses are documented in five different points for all load cases. It is drawn that the response is equivalent in the forward and aft loading area. The longitudinal extension of the load affects the stress in longitudinal direction, especially at the stiffener midspan. Compared to plate loading, stiffener loading nearly halves the transverse stress at the plate midspan while the longitudinal stress in the stiffener increases by magnitude. Keywords: Ice loads, global FE model, local FE model, ice-strengthened tanker, structural deformation Cite this Article Ozgur Ozguc. Modelling and Structural Analysis of Ice Strengthened Vessel. Journal of Offshore Structure and Technology. 2017; 4(1): 11–20p.