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

An improved particle swarm algorithm for optimization of implicit curved surface porous structure

A technology for improving particle swarms and implicit surfaces, applied in calculations, calculation models, special data processing applications, etc., can solve problems such as poor iteration performance, and achieve the effect of improving particle position update formulas

Active Publication Date: 2019-01-04
ZHEJIANG UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of porous structure optimization of implicit surface under given conditions, and improve the problem of poor iterative performance of standard particle swarm optimization algorithm in the presence of domain constraints, the invention provides an implicit surface optimization based on improved particle swarm optimization algorithm Porous structure optimization 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
  • An improved particle swarm algorithm for optimization of implicit curved surface porous structure
  • An improved particle swarm algorithm for optimization of implicit curved surface porous structure
  • An improved particle swarm algorithm for optimization of implicit curved surface porous structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0067] Typical implementation examples of the present invention are as follows:

[0068] Enter the implicit surface I-WP expression f(x,y,z)=2[cos(0.25πx)cos(0.25πy)+cos(0.25πy)cos(0.25πz)+cos(0.25πz)cos(0.25 πx)]-[cos(0.5πx)+cos(0.5πy)+cos(0.5πz)]=c, c∈[-0.6,0.6], x∈[0,8], y∈[0,8] , z∈[0,8], the wall thickness of the porous solid is 0.1mm, the particle swarm size is 30, and the maximum number of iterations is 30. Carry out particle swarm algorithm iteration on Intel Xeon 3.4GHz processor, the improved particle swarm algorithm proposed by the present invention and the standard particle swarm algorithm iteration result of different speeds are as follows image 3 As shown, the improved particle swarm optimization algorithm obtained more ideal results within 30 iterations, and the optimal position c opt = 0.00236185. Different speed settings will lead to significantly different search performance of the standard particle swarm algorithm. The improved particle swarm algorithm p...

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 an implicit curved surface porous structure optimization method based on an improved particle swarm optimization algorithm, which comprises the following steps of: inputting animplicit curved surface function expression to be optimized, porous solid wall thickness, particle swarm size and maximum iteration number; initializing particles, each particle containing a positionterm; calculating the fitness of each particle in the iteration; updating the local optimal position and the global optimal position in the particle swarm; according to the current position, the local optimal position and the global optimal position of the particles, the update position of each particle being calculated; when the mutation condition is satisfied, the particle update position beingmutated; until the maximum number of iterations is reached, the optimal position being output to generate the optimal implicit curved surface porous structure with optimal mechanical properties. By modifying the particle position moving rule, the method avoids the shortcomings of the standard particle swarm optimization algorithm under the restriction of the domain, and improves the local optimaland global optimal searching ability. The method is stable and reliable, especially suitable for parameter optimization of an implicit curved surface porous structure.

Description

technical field [0001] The invention relates to the field of computer-aided design and optimization, in particular to an implicit surface porous structure optimization method based on an improved particle swarm algorithm. Background technique [0002] An implicit surface is a mathematical surface with a definite function expression, also known as an isosurface. Different from parametric surfaces or discrete mesh surfaces widely used in the industrial field, implicit surfaces can represent 3D surfaces with any complex topology. In addition, complex Boolean operations can be quickly calculated on implicit surface functions. After geometric operations, it can still be conveniently expressed as an implicit function form. Due to these important advantages, more and more complex structures are constructed using implicit surfaces. [0003] Porous structure is a geometric structure with complex topology. According to different classification standards, it can be divided into open-...

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 Applications(China)
IPC IPC(8): G06F17/50G06N3/00
CPCG06N3/006G06F30/17
Inventor 冯嘉炜傅建中林志伟商策
Owner ZHEJIANG 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