Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Multi-arc curve shape optimization design method

An optimization design and curve shape technology, applied in the field of curve shape optimization design, can solve problems such as long design cycle, achieve the effect of improving efficiency and shortening time

Active Publication Date: 2015-10-07
NORTHWESTERN POLYTECHNICAL UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the existing multi-arc curve shape optimization design method with a long design cycle, the present invention provides a multi-arc curve shape optimization design method

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
  • Multi-arc curve shape optimization design method
  • Multi-arc curve shape optimization design method
  • Multi-arc curve shape optimization design method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] refer to Figure 1~5 . The present invention is described by taking a two-dimensional plate opening as an example. The size of the two-dimensional open plate is: length 100mm, width 100mm, thickness 2mm, and the initial opening is a round hole with a radius of 25mm. The Young's modulus of the model material is 2.1×10 5 Mpa, Poisson's ratio is 0.3. The entire model is fixed on the left side, and a uniform force of 100N acts on the right side. Design the shape of the hole in the center of the plate so that the area of ​​the plate is not greater than 8036mm 2 . The method steps are as follows:

[0030] Step 1: Establish a finite element model through the CAD model of the structure, and the boundary of the model is the multi-arc approximation result of the free curve obtained from the control points. At the same time, set the grid side length to 2mm, and the grid division method is free grid division. Define the load: apply a uniform force of 100N on the right side ...

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 multi-arc curve shape optimization design method which is used for solving the technical problem that an existing multi-arc curve shape optimization design method is long in design period. The technical scheme includes that the multi-arc curve shape optimization design method includes: selecting coordinates of control points to serve as optimization design variables, obtaining a free curve from the control points, subjecting the free curve to discretization prior to multiple arc approximation, performing finite element modeling, analysis and sensitivity solution by taking multiple arcs as shape edges, performing optimization iteration via obtained sensitivity information, and updating the coordinates of the initial control points till a final design result is converged. The multi-arc curve shape optimization design method realizes shape optimization design of a multi-arc curve, shortens optimization iteration time and improves efficiency of the multi-arc curve shape optimization design. The iteration times of convergence are decreased from 100 steps to 50 steps in the background technology, and maximum stress of a shape is lowered to 143.52MPa from 155.61MPa in the background technology.

Description

technical field [0001] The invention relates to a curve shape optimization design method, in particular to a multi-arc curve shape optimization design method. Background technique [0002] In aerospace, automobile manufacturing and other fields, a large number of components have a large number of complex surface contours and opening forms. In order to meet the needs of weight reduction, maintenance, exhaust and even aesthetics, various cavities are opened on the complex curved surface. The introduction of holes destroys the integrity of the structure, changes the force transmission path of the structure, leads to stress concentration around the hole, and reduces the fatigue life of the structure. [0003] The document "Zhu Jihong, Li Junshuo, etc., Application of modern shape optimization technology in the design of aero-engine parts, Aeronautical Manufacturing Technology, 2012 (23 / 24)" discloses a multi-arc curve shape optimization design method, which realizes multi-arc ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 孟亮张卫红谷小军牛草朱继宏
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com