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

Method for optimizing skins of airplane airfoil by subsonic flutter

An optimization method and subsonic technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of insufficient hardware and software resources, long time of genetic algorithm, etc. Long, repetitive effects

Active Publication Date: 2013-01-09
中国航空工业集团公司科学技术委员会 +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is integrated in the grid platform, on the one hand, it can solve the problem of insufficient hardware and software resources, and at the same time, it can solve the problem of too long time of genetic algorithm through parallel computing

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
  • Method for optimizing skins of airplane airfoil by subsonic flutter
  • Method for optimizing skins of airplane airfoil by subsonic flutter
  • Method for optimizing skins of airplane airfoil by subsonic flutter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0060] The technical scheme of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments:

[0061] The steps of this aircraft wing skin subsonic flutter optimization method are:

[0062] (1) Use the Catia software to establish a three-dimensional model of the aircraft airfoil, including skin 1, truss 2, beam 3, and rib 4, save the model file in .igs format, and input the .igs format file into MSC Patran software. Use the existing shape to establish the finite element model of the structure, see the appendix figure 1 . When modeling, the skin adopts CQUAD4 element, the truss and beam adopt CROD element, the airfoil structural mass is discretized into the concentrated mass acting on the skin element node 11, and the scalar mass element CMASS2 is used. The model also includes the counterweight mass and necessary boundary conditions. The plate element on the skin 1 on the main bearing structure is used as the d...

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 provides a method for optimizing skins of an airplane airfoil by a subsonic flutter based on a network computing platform. The method provided by the invention can take elements of each skin of the airfoil as objects to be optimized and also selects layering angles, layering thickness increment and layering positions as design variables; and a search which guarantees a genetic algorithm is processed in a space area comprising all possible solutions. The process of optimizing utilizes a double-circulation flow so that a decoupling problem of great design variables (more than 1000) is solved and also utilizes a 'small increment valley-filling method' to effectively avoid the oscillation of the algorithm so that a high repeatability of the algorithm is assured. The method provided by the invention is integrated into a gridding platform so that the method not only can solve the problem that the hardware-software resource is not enough, but also can solve the problem that thetime of the genetic algorithm is too long through a parallel computing.

Description

technical field [0001] The invention relates to a subsonic flutter optimization method for aircraft wing skin, which belongs to the field of aeroelastic tailoring of aircraft composite wing surfaces, and is used for subsonic flutter speed optimization in the design of aircraft composite wing surfaces. Background technique [0002] The flutter problem is a serious case of aircraft wing design, especially one of the main design constraints of the empennage. The wing surface often limits the flight envelope due to insufficient flutter speed, which becomes the key to the design. The application of composite material structure in aircraft design provides a new development field for aircraft structure technology. That is to make full use of the designability of composite materials, while satisfying the optimization of strength design, "aeroelastic tailoring design" can be carried out. The aeroelastic tailoring method is to use the anisotropy of composite materials and its variou...

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): G06F17/50G06N3/12
Inventor 崔德刚张睿杜海熊青岳程文渊
Owner 中国航空工业集团公司科学技术委员会
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