Publicações

Liu, B. e Guedes Soares, C. (2016), “Assessment of the strength of double-hull tanker side structures in minor ship collisions”, Engineering Structures, Vol. 120, pp. 1-12

The paper presents a simplified analytical method to examine the energy absorbing mechanisms of ship double-hull structures subjected to a flat edge indenter. To validate this method, a numerical simulation is conducted on a structural module derived from an experimentally scaled stiffened panel in previous work. The structural module represents one-fifth scaled double-hull tanker side structures including three spans along the longitudinal direction and two spans along the vertical direction. The paper provides practical information to estimate the extent of structural damage within double-hull tanker side structures during minor head-on collisions, where the inner panel does not participate in the energy dissipation of double-hull structure. The numerical definition of material nonlinearities for the selected mesh size is validated against previous experimental results. The numerical simulation manages to describe the plastic deformation and material rupture in the double-hull structure and to provide detailed information of the energy dissipated by each structural component. The simplified analytical method derives expressions to estimate the relation between the plastic deformation and the crushing force of the double-hull structure, giving a good agreement with the corresponding numerical force-displacement response. Moreover, the analytical method of internal mechanics is combined with the theoretical analysis of external dynamics to evaluate the energy absorbing mechanisms of double-hull tanker side structures in ship-to-ship collision. Therefore, the paper presents a procedure to assess the strength of a collided ship based on experiments of scaled structure found in literature.

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