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An Optimization Method for Implicit Surface Porous Structure

An implicit curved surface and porous structure technology, applied in geometric CAD, special data processing applications, etc., can solve problems such as the difficulty of multi-functional optimization of porous structures, and achieve convenient results

Active Publication Date: 2020-06-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] In order to solve the problem of difficulty in multifunctional optimization of existing porous structures, the present invention provides an optimization method for implicit curved surface porous structures

Method used

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  • An Optimization Method for Implicit Surface Porous Structure
  • An Optimization Method for Implicit Surface Porous Structure
  • An Optimization Method for Implicit Surface Porous Structure

Examples

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Embodiment

[0062] Typical implementation examples of the present invention are as follows:

[0063] Select the Diamond surface to be multi-functionally optimized, and the function expression is φ D (x,y,z)=cos(0.25πx)cos(0.25πy)cos(0.25πz)-sin(0.25πx)sin(0.25πy)sin(0.25πz)=c, where c∈[-0.6, 0.6], x∈[0,8], y∈[0,8], z∈[0,8], porous structure wall thickness t∈[0.1mm, 0.5mm], the implicit surface porous structure to be achieved is relatively The density is 0.1, the particle swarm size is 30, and the maximum number of iterations is 30.

[0064] Tested on 8G memory, 3.4GHz processor. The positions of initial particles and convergent particles are as follows figure 2 As shown, the convergence result of the iterative calculation process is as follows image 3 shown. By adding the fitness function constraint item, in the iterative process, the particles gradually iterate to the position that meets the relative density constraint, and at the same time gradually search for the maximum specifi...

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Abstract

The invention discloses an optimization method of an implicit curved surface porous structure, which comprises the following steps of: inputting an optimization implicit curved surface function expression, the implicit curved surface porous structure relative density, the particle swarm size and the maximum iteration number; initializing particles, each particle position coordinate including curvature parameter and wall thickness parameter of the implicit curved surface porous structure; calculating the constraint fitness of the iterative particle; Updating the local optimal position and the global optimal position in the particle swarm; calculating the update position of each particle by linear weighting; the curvature parameter in the particle position being the inverse number when the catastrophe requirement is satisfied; when the maximum number of iterations is exceeded, the iteration being stopped, the optimal particle position being output, and the implicit curved surface porousstructure corresponding to the optimal parameters being generated. In the method, the particle is iterated by linear weighting, and the catastrophe probability is added to ensure the random behavior of the particle. The iteration speed of the method is fast, and the curvature parameter and the wall thickness parameter are obtained by iteration, which can generate the implicit curved surface porousstructure satisfying the multi-functional requirements.

Description

technical field [0001] The invention relates to the field of computer-aided design and multifunctional optimization, in particular to an optimization method for an implicit curved surface porous structure. Background technique [0002] At present, in the field of computer-aided design, the modeling, analysis and optimization of solid structures have been researched relatively maturely, and a large number of professional modeling software and analysis software have been developed for structural design and optimization. In fact, in nature, there are a large number of porous structures in most natural structures, such as biological bones, which are typical porous structures. Porous structures generally have intricate internal pores. The structure of these pores is mostly the result of natural selection. With the change of external conditions, the porous structure becomes a complex structure with the most ideal performance in the process of continuous generation and change. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17
CPCG06F30/17
Inventor 冯嘉炜傅建中林志伟商策
Owner ZHEJIANG UNIV
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