基于雨流计数法的船体结构疲劳损伤评估方法研究

Study on Fatigue Loss Assessment Method of Hull Structure Based on Rain-Flow Counting Method

针对船舶在运营期间船体结构易受到疲劳等损伤,介绍一种改进型三峰谷值雨流计数法,在此基础上对船体结构疲劳损伤评估方法进行探讨,以期为船舶船体结构应力监测系统的构建提供理论支撑,进而为船舶提供早期危险报警和损伤评估,保证船体结构的安全性。通过算例分析验证了该雨流计数法的准确性以及高效性。

In view of the fact that the ship structure is vulnerable to fatigue and other damage during the operation period,an improved three peak valley rain-flow counting method is introduced.On this basis,the fatigue damage assessment method of ship hull structure is discussed in order to provide support for the construction of ship hull structure stress monitoring system,then it can provide early warning and damage assessment for the ship to ensure the safety of the hull structure.The accuracy and efficiency of the method are verified by calculation and analysis.