A method for intelligent generation of 3D model of truss structure
A truss structure, three-dimensional model technology, applied in the field of three-dimensional modeling, can solve problems such as errors, complex spatial structures, and large number of profiles
Active Publication Date: 2021-04-20
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
In addition, the frame structure usually constitutes a large number of profiles and forms a complex spatial structure
This makes the construction process of its 3D model very cumbersome and becomes the bottleneck of design work
And assembly design changes will also lead to a series of related profiles to adjust the shape of the end
This process also represents a lot of heavy work and is prone to error
Method used
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Embodiment Construction
[0032] Embodiments of the present invention are described in detail below, and the embodiments are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.
[0033] In this embodiment, through the image 3 The identification of the overlapping relationship between the parts at the connection point indicated by the arrow a in the topological model shown in a shows the implementation process of the proposed method, and proves the feasibility and effectiveness of the method. Depend on image 3 a It can be seen that there are both orthogonal parts and oblique parts at this connection point, and there are 6 parts passing through this connection point, and the number is relatively large, so the judgment of the overlapping relationship between the parts at this connection point has a Must be representative.
[0034] The specific method includes the following steps:
[0035] Step 1: According to the historical sample data...
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The present invention proposes a method for intelligently generating a three-dimensional model of a truss structure, which adopts a staged intelligent aided design of an overlapping frame structure, and divides the three-dimensional assembly modeling of an overlapping frame structure into qualitative overlapping relationship determination and quantitative geometry Computing the two processes, using the combination of deep learning and Zhu Liu algorithm to solve the key first stage, which is the process of qualitatively judging the overlapping relationship. Then use the geometric calculation method to complete the second stage, and finally realize the intelligent three-dimensional modeling of the truss structure. The invention can intelligently construct the three-dimensional assembly model of the frame structure effectively. The performance of the method is better, the time complexity of the algorithm is lower, and the modeling results are accurate and reliable. The 3D assembly model constructed is well consistent with the existing design principles, and the generated frame structure model is more in line with the current reality.
Description
technical field [0001] The invention relates to the field of three-dimensional modeling, in particular to a method for intelligently generating a three-dimensional model of a truss structure. Background technique [0002] Frame structure products are widely used in aerospace and mechanical products, but the expression forms are different in the conceptual design stage and the detailed design stage. The conceptual design stage is usually represented by a topology model, which is conducive to shortening the development cycle Design prototypes for finite element analysis, topology optimization, and size optimization. In the subsequent detailed design stage, the designer needs to generate the corresponding 3D model in CAD based on the topology model and profile specification table completed in the conceptual design stage for subsequent work. This process is as image 3 shown. However, by image 3 The topological model of (a) to image 3 (b) The conversion and construction of t...
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IPC IPC(8): G06F30/27G06F30/17
CPCG06F30/15G06F30/20
Inventor 莫蓉曹浩
Owner NORTHWESTERN POLYTECHNICAL UNIV