Large LNG transport ship double-shafting stay wire irradiation process

The invention discloses a large-scale LNG transport ship double-shafting stay wire irradiation process, which relates to the technical field of ship construction, and comprises the following steps of: preparing the work of a matching stage in the early stage, using a rudder system extension type rudder cylinder with a press-fit bearing in place, completing the reverse construction and side construction of sections and the determination of distance, and preparing before the determination of a shafting theoretical line. Shafting theoretical lines are determined through shafting irradiation, horizontal included angles between the single shafting theoretical lines and the center line of the ship body are 3.5 degrees, a stern tube assembly is installed in a centering mode, a stern tube is fixed through an epoxy pouring cushion block and is completed under the guidance of an epoxy manufacturer service engineer, and the ship body center line is fixed through the epoxy pouring cushion block. A screw shaft and a prope