等效分析法在分析老龄化船舶抗碰撞性能中的应用

Application of equivalent analysis to analyzing anti-collision performance of aged ships

为了简化评估结构疲劳损伤后的抗碰撞性能,仿照结构蠕变分析中的等时应力-应变曲线的思想,提出了一种基于应变等效的等效分析法,并与通常的一般分析方法进行了比较。对比分析结果表明:等效分析法与通常的一般分析方法模拟的结构最大抗破坏作用力几乎相同,并且两者模拟的结构破坏能相对误差较小。这验证了等效分析法的有效性,说明等效分析法可用于船舶全寿命期内抗碰撞性能的快速评估。

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.