Aiming at the characteristics of complex relationship and high reusability of vibration fault knowledge of steam turbine unit

a semantic modeling method of fault knowledge is proposed based on ontology theory. Firstly

the ontology semantic web of turbine equipment structure

boundary condition and fault knowledge are constructed to retain more abundant semantic information and improve the reuse and management efficiency of knowledge.Secondly

the knowledge consistency checking based on ontology axiom is discussed to avoid knowledge conflict and redundancy

and ontology query language is used to improve the flexibility and efficiency of fault knowledge retrieval. Thirdly

the ontology fault knowledge is transformed and stored in Neo4 j graph database to form the fault knowledge map and visualize the knowledge. Finally

the characteristics of the proposed method are illustrated by a case study of fault knowledge modeling.