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

Aerodynamic-thermal-structural coupling analysis method based on reduced-order model

A reduced-order model and coupling analysis technology, applied in the aerospace field, can solve problems such as the contradiction between calculation efficiency and calculation accuracy, and achieve the effects of shortening the product design cycle, improving analysis efficiency, and improving design

Inactive Publication Date: 2016-06-01
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF3 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly aims to solve the problem of the contradiction between the calculation efficiency and the calculation accuracy of the hypersonic aerothermal structure in the full ballistic calculation in the prior art

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
  • Aerodynamic-thermal-structural coupling analysis method based on reduced-order model
  • Aerodynamic-thermal-structural coupling analysis method based on reduced-order model
  • Aerodynamic-thermal-structural coupling analysis method based on reduced-order model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The aerothermal structural analysis method based on the reduced-order model, such as figure 1 As shown, the specific steps are as follows:

[0027] Step 1. Taking the typical lifting surface F-104 wing commonly used in aerothermoelastic analysis as the research object, the geometric model of the wing structure and the finite element model figure 2 shown. All elements in the finite element model are shell elements, and the material is titanium alloy. For the aerothermal reduction model in the analysis of the aerothermal structure of the lift surface of a typical hypersonic vehicle, the variables are determined to be the flight Mach number, flight altitude, and flight angle of attack that vary with the flight trajectory. The design space B is shown in Table 1.

[0028] Table 1 Design variables and design space

[0029]

[0030] The number of initial sample points is 30, and the relative error allowable threshold of the reduced-order model is E e Take 5% and fly ba...

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 an aerodynamic-thermal-structural coupling analysis method based on a reduced-order model. The method comprises the steps that an aircraft analysis model is established; an initial aerodynamic thermal reduced-order model is established; an ensemble average relative error of the established aerodynamic thermal reduced-order model is verified; an aerodynamic thermal reduced-order model meeting the design precision requirements is established; the change condition of a structural internal temperature field of an aircraft in the whole trajectory flying process is obtained; flutter analysis of the aircraft under the action of a thermal load is conducted. According to the aerodynamic-thermal-structural coupling analysis method based on the reduced-order model, a reduced-order model method and a point adding method are adopted, the reduced-order model of related physical quantities is obtained rapidly and accurately, the aerodynamic-thermal-structural analysis efficiency is improved, an efficient and accurate analysis result can be provided in the aircraft design process, the product design cost is reduced, the design efficiency is improved, and the product design cycle is shortened.

Description

technical field [0001] The invention belongs to the field of aerospace, and in particular relates to an aerodynamic-thermal-structure coupling analysis method based on a reduced-order model. Background technique [0002] A hypersonic vehicle usually refers to an aircraft that can fly at a speed of not less than Mach 5, is powered by a ramjet engine, and can fly for a long distance in adjacent space. Hypersonic technology is an important branch of aerospace technology. It has broad application prospects in transportation, national defense and other fields. Due to the complex coupling relationship between hypersonic flow, propulsion system, vehicle structure and control system, modeling and analysis of hypersonic vehicle is a difficult task. Moreover, with the wide application of new materials and thin-walled structures in modern hypersonic vehicles, the problem of aerothermoelasticity of hypersonic vehicles has become increasingly serious. Therefore, it is very important t...

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): G06F17/50
CPCG06F30/23
Inventor 刘莉岳振江陈鑫康杰周思达
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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