Method for generating two-dimensional layout diagram of three-dimensional bridge model by using CATIA software

Abstract

The present invention discloses a method for generating a two-dimensional layout diagram of a three-dimensional bridge model by using CATIA software. The method comprises the following steps: receiving data for designing a road in the CATIA software, establishing a three-dimensional model of the bridge, and storing all key design information in a parameter form and a design list form in the CATIAsoftware into the three-dimensional model space; making a two-dimensional graphic template by using the user-defined feature UDF in the CATIA software; in the three-dimensional model space where the overall bridge model is located, generating a vertical unfolding surface corresponding to the vertical hook surface where the center line of the road is located, a horizontal unfolding surface parallelto the geoidal surface, and a plurality of vertical surfaces passing through the sub-line; and projecting the corresponding information respectively to generate a layout diagram of each surface of the bridge in the traditional two-dimensional drawing. According to the method provided by the present invention, information in the three-dimensional graph can be effectively transmitted to the two-dimensional graph, and data synchronization and model linkage can be realized.

Description

technical field [0001] The invention relates to the technical field of computer-aided design, in particular to a method for generating a two-dimensional layout drawing from a three-dimensional bridge model by using CATIA software. Background technique [0002] CATIA software is usually used for three-dimensional modeling in the field of mechanical engineering, and is rarely used for making two-dimensional drawings. Moreover, most of the drawings produced in the field of mechanical engineering are detailed drawings of components and general assembly drawings, and the graphics area is usually a rectangle or a rectangle with an aspect ratio of no more than 2:1. Elevation General Arrangement)" or "Front Plan General Arrangement" is a drawing in which the length direction of the figure is much larger than the width direction (the aspect ratio is greater than 2:1). [0003] Therefore, bridge designers can only refer to the existing CATIA drawing methods to make bridge component d...

AI Technical Summary

Problems solved by technology

Moreover, most of the drawings produced in the field of mechanical engineering are detailed drawings of components and general assembly drawings, and the graphics area is usually a rectangle or a rectangle with an aspect ratio of no more than 2:1. Elevation General Arrangement)" or "Front Plan General Arrangement" is a drawing in which the length direction of the figure is much larger than the width direction (the aspect ratio is greater than 2:1)

[0003] Therefore, bridge designers can only refer to the existing CATIA drawing methods to make bridge component drawings and partial large-scale drawings, but they cannot solve the problem of converting the overall model of the bridge with a large aspect ratio established in CATIA software from "3D graphics" to " Publishing Issues of Drawings in Two-dimensional Graphics

In addition, the direct projection bridge model also has the problem of overlapping structural lines, which is difficult to handle for 2D maps

[0004] The existence of the above problems hinders the application of CATIA software in the field of bridge engineering. Therefore, it is necessary to propose a method that can provide complete design information for the production of two-dimensional graphics on the premise of ensuring the integrity of the overall model of the bridge.

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