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An Image Processing-Based Finite Element Node Coordinate Extraction Method

An extraction method and finite element technology, applied in the field of finite element node coordinate extraction, can solve problems such as reducing work efficiency

Active Publication Date: 2020-04-28
哈尔滨泰铭科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of ensuring that the grid is not very sparse, an ordinary tire contains at least 3000 nodes, which need to be manually extracted, and the time for extracting nodes occupies at least 40% of the pre-processing time, and this repetitive Work will make people feel irritable, which further reduces work efficiency

Method used

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  • An Image Processing-Based Finite Element Node Coordinate Extraction Method
  • An Image Processing-Based Finite Element Node Coordinate Extraction Method
  • An Image Processing-Based Finite Element Node Coordinate Extraction Method

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Embodiment Construction

[0053] The present invention will be described in further detail below in conjunction with the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation is provided, but the protection scope of the present invention is not limited to the following embodiments.

[0054] by figure 2 As the initial geometric model of this embodiment, according to the implementation steps of the present invention, at first the geometric model is manually divided into grids in CAD software, divided into triangular or quadrilateral units, such as image 3 shown. In order to better identify the intersection point, the model line segment of the boundary is extended, and at the same time, the color of all lines is adjusted to black. Save the area where the grid is located as an image in .jpg format with a resolution of 96dpi.

[0055] Use Matlab language to read the image and obtain matrix data, the siz...

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Abstract

The invention discloses a method for extracting finite element node coordinates based on image processing. Under CAD software, grids are manually divided for a two-dimensional geometric model, a picture with the model of the well divided grids is cut out, segment intersection points are determined by processing number and positions of pixel points around each pixel point, relative positions of each node are determined, and real coordinates of the nodes are obtained through coordinate transformation. According to the method, the intersection points can be extracted conveniently, and finite element pre-processing efficiency is greatly improved.

Description

technical field [0001] The invention relates to a method for extracting finite element node coordinates based on image processing, and belongs to the technical field of tire finite element analysis preprocessing. Background technique [0002] Finite element analysis is one of the trends in tire research in recent years, and major tire companies and research institutes are all committed to this research. For example, the patent CN200710194353X of Sumitomo Rubber Industries Co., Ltd. provides a tire model modeling method and simulation method; Michelin's patent US2008 / 064527 uses finite element analysis to determine the vulcanization limit part of the tire or tread; Korea Tire Co., Ltd. Patent CN2011102066300 analyzes the forming method of the tire cross section through finite element analysis, etc. [0003] The node is the basis of the finite element model, and extracting the node coordinates of the model is one of the main contents of the finite element preprocessing. At p...

Claims

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Application Information

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IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor 王友善崔志博吴健粟本龙
Owner 哈尔滨泰铭科技有限公司
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