This paper presents a non-linear finite element study to obtain the ultimate compressive strength of dented FPSO side stiffened panels. The finite element program ABAQUS was used to perform numerical analysis. The analysis is carried out in two steps. First the supply collision damage is imposed using the ABAQUS explicit code program. After the indentation, a compressive load is applied and then the panel residual compressive strength is obtained. A parametric study was accomplished to evaluate the influence of the dent depth on the stiffened panel strength. Damages occurring on the stiffener and between the stiffeners are compared.

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