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

An Algorithm for Transforming Nodal Loads Between Grids of Different Engineering Physics Models

A technology of node load and engineering physics, applied in the direction of electrical digital data processing, instrumentation, geometric CAD, etc., to achieve the effect of improving adjustability, improving computing efficiency, and improving algorithm accuracy

Active Publication Date: 2020-07-31
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is only based on the physical calculation characteristics of the load, and does not need to be coupled with the energy transfer of the interface displacement, which completely solves the efficiency problem of the scale of inversion operation of large linear equations

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 Algorithm for Transforming Nodal Loads Between Grids of Different Engineering Physics Models
  • An Algorithm for Transforming Nodal Loads Between Grids of Different Engineering Physics Models
  • An Algorithm for Transforming Nodal Loads Between Grids of Different Engineering Physics Models

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0128] In this embodiment, there are two forms of node load distribution on regular plane grids, namely, uniform distribution and sinusoidal distribution. The nodes of the fine grid of model a are converted to the centroid points of the coarse grid of model s, and three constraints are adopted. The load-independent transformation algorithm implementation of the equations was performed in order to test the basic capabilities of the algorithm of the present invention. The specific process includes the following steps:

[0129] Step S11, set up two kinds of grid node coordinates on a 100 * 100 plane with Matlab software: one is the node coordinates (x aj ,y aj )j=1,...,34; the other is the 15×11 rectangular grid s node coordinates (x sk ,y sl ), k=1,...,15; l=1,...,11. Make two kinds of function values ​​on the grid a: one is a function with a uniform value equal to 10; the other is to calculate the node function value according to the sinusoidal column function 10×sin(π·x / 10...

Embodiment 2

[0134] The present embodiment is the configuration of the right half wing of an unmanned aerial vehicle, and the plane view of the wing is as Figure 4shown. The analysis task is to convert the nodal load data calculated by computational fluid dynamics CFD on the wing object surface to the grid centroid point of the coarse grid used for structural analysis. The radial basis interpolation function RBF point-by-point quasi-interpolation distribution algorithm in the literature is adopted, and the 3-constraint equation independent load conversion algorithm and the 6-constraint equation independent load conversion algorithm of the present invention are used to implement the load distribution calculation of this example respectively, and adopt the present invention The LAC index given in step 7 evaluates the distribution characteristics of its distributed load.

[0135] Step S21, using Matlab software to design a software program according to the radial basis interpolation functio...

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

An efficient algorithm for node load conversion among different engineering physical model grids utilizes different monotonous subtraction value characteristics of different negative power exponent point spacing monomials, introduces more constraint equations, improves distribution characteristics of node load conversion between different grids, establishes a distribution coefficient in combination with scatter full scanning, has no requirement for regularity of node grids, and is easy to achieve parallel computing, and the finally obtained linear equation set does not exceed six orders, thuscompleting solving the inversion calculation efficiency problem of a large equation set. Numerical examples show that the algorithm of the invention is obviously improved and enhanced in precision andefficiency compared with the existing algorithm technology. The algorithm technology provided by the invention has important application value and significance for improving node load conversion calculation among different grid models in engineering coupling problem numerical analysis.

Description

technical field [0001] The invention belongs to the technical field of numerical analysis of modern engineering physics, and relates to an algorithm for transforming scattered loads of grid nodes of different models. Background technique [0002] In the analysis of modern engineering physics problems, numerical calculation has become the third type of technical means in addition to theoretical research and experimental testing. It has many advantages such as high efficiency, quickness and low cost for engineering project decision-making and technical performance prediction. Usually, the design and analysis of engineering physics devices involves multidisciplinary issues, and multiple types of physical quantities between different disciplines are coupled and influenced by each other. Due to the professional differences of different disciplines and the differences in the magnitude of physical quantities, numerical calculation technology needs to use the physical interface betwe...

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): G06F30/15G06F119/14
Inventor 艾俊强孙秦刘彦杰谢怀强
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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