In order to solve the problems of the lack of effective management and reusability of ship welding procedure knowledge

a method based on ontology for ship welding procedure knowledge graph is proposed. Firstly

based on the ship welding procedure content

the ship welding procedure knowledge is condensed

the welding procedure knowledge ontology is established

and the semantic relationship extraction between entities and concepts is completed based on the third-order tensor triplet method. Secondly

the welding procedure knowledge graph is constructed according to the acquired entity and its semantic relationship

and a graph mechanism between ontology and knowledge graph is established;Finally

in order to avoid the repeated storage of the common attributes of the concept

the welding procedure knowledge is stored by considering the hierarchical table structure model. On this basis

the ship welding procedure knowledge management system is designed and developed

and the knowledge graph is used to realize the expression and semantic retrieval of the welding process knowledge

and the rationality of the ship welding procedure knowledge graph construction method is verified.