考虑腐蚀因素的船体结构寿命预测方法

为建立考虑腐蚀因素的船体结构寿命预测方法,在分析现有常用的船体结构腐蚀损伤时变模型的基础上,根据舰船维修保障实际情况建立了考虑腐蚀防护系统作用时间和维修时间等因素的腐蚀时变模型。根据相关规范选择了船体结构腐蚀寿命标准,并建立了一种计算船体结构腐蚀寿命的方法。该方法建立了船体结构腐蚀寿命与腐蚀防护系统作用时间和修理时间等因素之间的量化关系,可以用于预测均匀腐蚀条件下船体结构寿命,也可以反过来指导腐蚀防护系统设计指标的选择和船体结构维修策略的确定。

Life prediction method of hull structures considering corrosion factors

In order to establish a life prediction method for hull structures considering corrosion factors, based on the analysis of the existing time-varying corrosion damage models of ship hull structures, a time-varying corrosion model considering the factors of action time and maintenance time of corrosion protection system was established according to the actual situation of ship maintenance support. According to the relevant codes, the lifetime standard of hull structure was selected and a prediction method for calculating the lifetime of hull structures was established. The method established the quantitative relationship between the lifetime of hull structure and the factors such as the action time and repair time of corrosion protection system. This method can be used to predict the life of ship structure under uniform corrosion condition, and in turn can be used to guide the selection of design indexes of corrosion protection system and the determination of maintenance strategy of hull structure.