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

Continuum body frequency constraint topological optimization design method considering damage-safety

A technology of frequency constraints and topology optimization, applied in design optimization/simulation, geometric CAD, etc., can solve problems such as destruction and catastrophe, and achieve the effects of increasing redundancy, reducing sensitivity, strengthening theoretical significance and application value

Pending Publication Date: 2020-06-09
BEIJING UNIV OF TECH
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result of traditional frequency topology optimization is similar to the skeleton structure. Although this topology maximizes the utilization rate of materials under the condition of considering frequency, in the face of local damage (caused by collision, explosion, fatigue failure), the traditional topology Complete destruction would occur with catastrophic consequences

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
  • Continuum body frequency constraint topological optimization design method considering damage-safety
  • Continuum body frequency constraint topological optimization design method considering damage-safety
  • Continuum body frequency constraint topological optimization design method considering damage-safety

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Such as figure 1 As shown, the present invention provides a kind of continuum frequency constrained topology optimization design method considering the damage-safety condition, and the specific solution is as follows:

[0022] The first step is to determine the base structure of the continuum and establish a finite element model:

[0023] First, based on the design requirements, determine the maximum design boundary of the continuum structure to be optimized, that is, determine the base structure, and determine the damaged design domain and non-damaged design domain according to certain performance requirements; secondly, based on the MSC.Patran software platform, establish the base structure Geometric model and finite element mesh division; finally, define material, assign unit properties, and impose boundary conditions; finally, set modal analysis output options.

[0024] The second step is to determine the number of damage cases, and input the initial damage area ce...

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 continuum frequency constraint topological optimization design method considering damage-safety. The continuum frequency constraint topological optimization design method comprises the following steps: firstly, establishing a finite element model based on a continuum-based structure; determining a damage working condition number, and inputting an initial damage area center coordinate value and a damage area parameter; inputting frequency constraint optimization parameters to form a frequency constraint optimization model considering damage-safety conditions; sequentially carrying out modal analysis on the damage-safety structure containing the damage working condition, and extracting a modal analysis result of the damage condition of each structure; establishing an approximate continuous mathematical optimization column formula of the topological optimization model considering the frequency constraint under the damage-safety condition; solving the optimizationmodel by adopting a mathematical programming algorithm; and performing inversion processing on the optimal topological configuration to obtain the optimal topological configuration and the fundamental frequency of the optimal configuration. According to the method, the redundancy of the structure can be obviously improved, and a reference is provided for considering the topological optimization problem of damage-safety in the field of dynamics.

Description

technical field [0001] The invention belongs to the technical field of engineering structure design, and in particular relates to a frequency-constrained topological optimization design method of a continuum under damage-safety conditions. Background technique [0002] Topology optimization is to seek the best force transmission path of the structure with the material distribution as the optimization object under the given external load and boundary conditions. This optimization method is gradually developed with the rapid development of finite element theory and computer software technology. . Compared with size optimization and shape optimization, structural topology optimization can determine more design parameters, save materials more significantly, and achieve greater economic benefits. At the same time, it can provide engineering designers with a comprehensive It is very attractive to engineering designers to apply the optimal scheme to the layout of the structure. ...

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): G06F30/23G06F30/17
Inventor 杜家政孟凡伟汤威张颖
Owner BEIJING UNIV OF TECH
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