Simulation interactive construction method and system for large floating crane girder erection

The invention discloses a large floating crane girder erection simulation interactive construction method. Comprising the following steps: establishing a three-dimensional model in a simulation interaction system, inputting an initial girder erection scheme, carrying out analogue simulation, obtaining a final girder erection scheme, guiding actual girder erection construction through the final girder erection scheme, and carrying out synchronous updating in the simulation interaction system so as to guide girder erection construction in real time. Through the technologies of man-machine interaction, a driving engine, digital twinning and the like, on the premise that a real construction scene is completely simulated, advanced drilling, war game deduction and advanced planning are carried out on a frame beam, and a powerful tool is provided for formulating a reasonable process arrangement, formulating a reasonable construction period and eliminating potential safety hazards; moreover, the simulation interactio