Construction of Knowledge Graph of Maintainability Design Based on Multi-domain Fusion of High-speed Trains

In order to realize the knowledge extraction, knowledge fusion and structured storage of unstructured high-speed trains multi-domain data, the construction method of high-speed trains maintainability design knowledge graph was studied based on multi-domain data fusion. The ontology concept elements of model layer, the processes of the construction of the data layer and the knowledge fusion of high-speed trains maintainability design knowledge graph were analyzed closely, the bogie knowledge graph platform and the knowledge retrieval system were displayed based on Neo4j graph database. The knowledge graph construction technology studied may extract and integrate knowledge from multi-source and multi-domain data in the field of high-speed trains, assist designers in product maintainability design and improve product quality. © 2022 China Mechanical Engineering Magazine Office. All rights reserved.