Lofting method for stern molded line containing pod prosthesis

Abstract

The invention belongs to the technical field of ship body molded line lofting and fairing, and discloses a lofting method for a stern molded line containing pod prosthesis which comprises the following steps: obtaining a fairing stern molded line graph according to an original ship body molded line graph; according to the original pod prosthesis design module, obtaining a theoretical pod prosthesis profile; covering the theoretical pod prosthesis molded line into the fairing stern molded line graph to obtain a space line, and fairing to obtain a boundary line; obtaining a shear pod prosthesis profile according to the boundary line and the theoretical pod prosthesis profile, and then performing fairing treatment to obtain a fairing pod prosthesis profile; obtaining a stern molded line without a pod prosthesis according to the boundary line and the fairing stern molded line; and splicing the fairing pod prosthesis molded line and the stern molded line without the pod prosthesis to obtain a stern molded line graph containing the pod prosthesis. The stern molded line and the pod prosthesis molded line are defined in a database for fairing treatment, so that ship design software can be adopted for fairing treatment, and the lofting efficiency of the pod prosthesis molded line is improved by determining a boundary line.

Description

technical field [0001] The invention relates to the technical field of lofting and smoothing of ship hull lines, in particular to a method for setting out lines of a stern including a pod dummy. Background technique [0002] The hull shape line is the theoretical hull curve obtained by the upstream design institute based on the experimental design of the mother ship and the ship model tank. These curves have local uneven areas. If the hull is constructed according to this shape line, the hull plate will be uneven. , Unsightly, and will increase the navigation resistance of the underwater part. Therefore, before ship design and construction, the shipyard must first perform three-way smoothing on the hull shape line provided by the design institute, and obtain the smooth shape line diagram and shape line data, which can be used for subsequent hull structure lofting and structural Design modeling work. [0003] Stakeout methods include digital stakeout and manual stakeout. D...

AI Technical Summary

Problems solved by technology

If an automatic method is used to carry out the overall lofting and smoothing of the stern shape line including the pod dummy, it is impossible to use the existing ship design software

If manual lofting is used, although the lofting work can be completed, the workload is doubled and the smoothing accuracy is far less than that of software lofting. What is more critical is that manual lofting cannot generate profile data for subsequent design modeling

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