The invention relates to an
assembly type bridge modeling method based on a
large model and an RAG technology. The method comprises the steps that a bridge standard component
library is established based on an
assembly type bridge standard image set; calling a large
language model, and generating standardized knowledge statements based on the bridge standard component
library; a
word embedding method is adopted to convert the normalized knowledge statement into vectors, and the vectors are stored in a vector
database; converting an input natural statement query into a vector by adopting a
word embedding method, and retrieving in a vector
database to obtain a normalized knowledge statement related to the query; performing
parameter analysis and optimization on the retrieved knowledge statements based on a large
language model by utilizing an RAG technology so as to generate component parameters; and calling a
component modeling algorithm based on each component parameter to generate a component three-dimensional model, and assembling the component three-dimensional model to obtain a fabricated bridge model. According to the method, component parameter sorting, knowledge statement intelligent combination, efficient semantic retrieval, parameter optimization, three-dimensional model automatic generation and the like are organically integrated, and the modeling efficiency and quality are improved.