Method and system for predicting transient characteristics of natural circulation system under ocean condition

The invention discloses a method and a system for predicting transient characteristics of a natural circulation system under ocean conditions, and the method comprises the following steps: constructing a motion analysis model; based on the motion analysis model, constructing a natural circulation system numerical model; performing simulation based on the natural circulation system numerical model to obtain a transient characteristic data set; preprocessing the transient characteristic data set to obtain standardized data; obtaining a prediction model based on the standardized data; and collecting real-time data, and performing prediction based on the prediction model to obtain a prediction result. According to the method, important parameter changes of the natural circulation system under different ocean conditions can be accurately predicted, the defect that super-real-time prediction of transient characteristics of the natural circulation system is difficult to carry out by a traditional numerical simulatio