Procedure for Assessing the Structure of the CPF Considering the Loss of Strength Due to Corrosion.

摘要

The report describes the effect of possible corrosion of the hull plating and stiffeners on the structural strength of the Canadian Patrol Frigate in deep departure hogging and light operational sagging conditions. Balance on an eight meter wave was the sea state loading case considered. A MAESTRO analysis was carried out to obtain the initial structural strength, then the effects of corrosion were assessed. To model corrosion, areas of plating and the attached stiffeners were reduced in cross-section and modelled in detail. After each reduction, the structure was analysed using the finite element analysis program, VAST, to determine the effect on strength when applying the boundary conditions and loading from the MAESTRO analysis. The adequacy parameters and stresses with and without corrosion are presented in graphical form as a measure of the hull strength.