Gear model region parameterization method based on subdivision technology and boundary replacement

A gear model and parameterization technology, applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of the quality of the parameterization of the affected area and the difficulty of parameterization.

Active Publication Date: 2018-11-06
HANGZHOU DIANZI UNIV
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing methods can only deal with the parameterization of some simple regions, but for some graphical models with complex regions, it is difficult to achieve high-quality param

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gear model region parameterization method based on subdivision technology and boundary replacement
  • Gear model region parameterization method based on subdivision technology and boundary replacement
  • Gear model region parameterization method based on subdivision technology and boundary replacement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] In the following, a curved boundary model of a gear shape is given in combination with practical applications, and the present invention is used to perform region parameterization to obtain a parameterized model required in engineering applications, so that the gear model is more suitable for isogeometric analysis.

[0052] The parameterization method of gear model area based on subdivision technology and boundary replacement is as follows:

[0053] step 1, figure 1 is a gear model, the inner and outer boundaries of the gear model are sampled, starting from the first sampling point on the inner and outer boundaries, and each time four sampling points are sequentially taken to fit a cubic uniform B-spline curve, Among the two adjacent cubic uniform B-spline curves, the first sampling point used when fitting the latter cubic uniform B-spline curve is the last sampling point used when fitting the previous cubic uniform B-spline curve; adjust Control points, so that the cu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a gear model region parameterization method based on subdivision technology and boundary replacement. A graph model with a complex region is difficultly subjected to high-quality parameterization. According to the method, the concave-convex degree of each section of a curve is reduced through a curve segmentation method, and a turnover quadrilateral mesh model is ensured not to be generated, so that the parameterization quality of a gear model is optimized, and the effectiveness requirement of the gear model on isogeometric analysis in engineering application is met; then by modifying a mean distance value of polygonal boundaries of the gear model and uniformizing the distances between the vertexes of the boundaries, the generation rate of quadrilateral meshes is improved; and a boundary replacement method is used to ensure that the shape of the gear model is not changed, and a smoothing method and a C-C subdivision method are used to optimize the gear model insmoothness and continuity, so that the smoothness and the robustness requirements of the engineering application on the isogeometric analysis are met.

Description

technical field [0001] The invention belongs to the field of computer-aided design and engineering application, in particular to a gear model area parameterization method based on subdivision technology and boundary replacement. Background technique [0002] Computer-aided design (CAD) technology and computer-aided engineering (CAE) technology have a very far-reaching influence in today's computer application and development, and they have been widely used in aerospace, automobile manufacturing, architectural design, mechanical electronics and other fields. application. In CAD technology, the object shape is represented by the boundary model, and the boundary model contains the information of the internal surface of the geometric model. Isogeometric analysis often requires parameterization inside the geometric model area. Therefore, in order to make the CAD model more suitable for isogeometric analysis, it is necessary to study the method and technology of constructing area...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F17/50
CPCG06F30/17
Inventor 徐岗李博剑许金兰肖周芳吴卿
Owner HANGZHOU DIANZI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap