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Shell plating automatic expansion method based on AutoCAD

An automatic unfolding and plate unfolding technology, which is applied in geometric CAD, special data processing applications, instruments, etc., can solve the problems of long consumption cycle, cumbersome process, and shortage, achieve a high degree of automation, and improve the effect of drawing efficiency

Pending Publication Date: 2018-11-09
SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In the ordinary AutoCAD design environment, due to the lack of quick drawing tools for outer panel development, a large number of repeated manual operations are required when drawing, the process is cumbersome, the cycle is long, and the drawing efficiency is not ideal

Method used

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  • Shell plating automatic expansion method based on AutoCAD
  • Shell plating automatic expansion method based on AutoCAD
  • Shell plating automatic expansion method based on AutoCAD

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Experimental program
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Embodiment Construction

[0040] The present invention will be further described below in conjunction with accompanying drawing.

[0041] The AutoCAD-based automatic unfolding method of the outer panel of the present invention, by unfolding FL into SE, the key is to obtain the intersection point of the longitudinal line on the FL and the rib line, and calculate the coordinates of the corresponding point on the SE. Here, two concepts are defined first: 1) Rib line: generally refers to any member line, plate suture line or other virtual line on the surface of the hull plate within the plane of the rib. 2) Longitudinal line: generally refers to any member line, plate seam line or other virtual line intersecting with the frame line on the hull surface. The hull molding is made up of both.

[0042] see figure 1 , the method for automatic expansion of the outer panel includes the following steps:

[0043] 1. Establish project items: Write all fixed input conditions required in the process of unfolding th...

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PUM

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Abstract

The invention discloses a shell plating automatic expansion method based on AutoCAD. Based on FL, the method comprises the following steps: writing each fixed input condition needed in a shell platingexpansion process into one text file, and storing the file as an engineering item; numbering frame lines and vertical lines in the FL through giving expansion data; identifying the frame lines and the vertical lines through serial numbers, acquiring points of intersection of the vertical lines and the frame lines, calculating corresponding points of the points of interaction on an SE, and performing shell plating expansion. In the method, the FRAME LINES are used as a data source, fast expansion of the shell plating is realized, and drawing efficiency of the SHELL EXPANSION is improved greatly.

Description

technical field [0001] The invention relates to the field of hull structure drawing, in particular to a method for automatically expanding hull panels. Background technique [0002] The shell expansion drawing (SHELL EXPANSION, hereinafter referred to as SE) is one of the most important structural drawings in ship design, reflecting important contents such as the structural form of the hull shell, plan layout and section division. Usually, SE is drawn based on the frame line diagram (FRAME LINES, hereinafter referred to as FL). [0003] The expansion of the outer plating in ship design is an approximate expansion, that is, horizontal expansion, but not vertical expansion. Therefore, after any point on the hull plate is unfolded, the abscissa X along the length of the ship remains unchanged, and the ordinate Y along the width of the ship is related to the curve length of the point on the rib line from the center line (interval girth) about, refer to figure 2 . figure 2 , ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15
Inventor 陈茂勇陈飞
Owner SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD
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