等效分析法在分析老龄化船舶抗碰撞性能中的应用

In order to simplify the evaluation of the anti-collision performance after structural fatigue damage, an equivalent stress-strain curve method based on strain equivalence was proposed in the same way as the isochronous stress-strain curve in structural creep analysis. And compared with the general analysis, the results of comparative analysis show that the maximum damage reaction force from the equivalence analysis method is almost the same as that from the general analysis method, and the relative error of the structural failure energy simulated by the two methods is relatively small. It validates the effectiveness of the equivalence analysis method. And the equivalence analysis method is more friendly to model and evaluate rapidly the anti-collision performance over the entire life of a ship.