A damage characteristic analysis method for air-breathing hypersonic UAV

A hypersonic and characteristic analysis technology, applied in electrical digital data processing, instrumentation, geometric CAD, etc., to achieve the effect of reference and accurate damage characteristic analysis results

Active Publication Date: 2022-03-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain defects in these research results. First, the hypersonic UAV models they studied are all rigid-body models; , during the flight of the drone, due to the elastic deformation of the fuselage surface, unsteady air pressure is formed around the drone, and the fuselage is subjected to unsteady aerodynamic force

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
  • A damage characteristic analysis method for air-breathing hypersonic UAV
  • A damage characteristic analysis method for air-breathing hypersonic UAV
  • A damage characteristic analysis method for air-breathing hypersonic UAV

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0100] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0101] The present invention designs a method for analyzing damage characteristics of an air-breathing hypersonic unmanned aerial vehicle, comprising the following steps:

[0102] Step 1: Establish a force model of the whole body of the UAV considering elastic factors, and analyze the unsteady aerodynamic force;

[0103] Step 2: According to the stress information obtained in step 1, establish a dynamic model of the UAV's whole body damage;

[0104] Step 3: Establish the UAV longitudinal elastic model, analyze the key difference between the UAV longitudinal elastic model and the longitudinal rigid body model, and demonstrate the necessity of considering aeroelasticity when studying the damage characteristics of the air-breathing hypersonic UAV;

[0105] Step 4: According to different flight states, analyze the damage characteristics of eac...

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 method for analyzing the damage characteristics of an air-breathing hypersonic unmanned aerial vehicle. The steps are: establishing a stress model of the entire fuselage of the unmanned aerial vehicle considering elastic factors, and analyzing the unsteady aerodynamic force; UAV full-body damage dynamics model; establish UAV longitudinal elastic model, analyze the key difference between UAV longitudinal elastic model and longitudinal rigid body model, and demonstrate the consideration of aeroelasticity when studying the damage characteristics of air-breathing hypersonic UAV Necessity: According to different flight states, analyze the damage characteristics of each surface of the UAV to determine the key variables that affect the damage evolution. The present invention takes the whole fuselage of the UAV as the research object, fully considers the impact of the elastic vibration of the UAV during the flight process, combines the damage model with the flight dynamics of the UAV, and analyzes the UAV angle of attack, The influence of flight speed, altitude and rudder angle on the accumulation of fuselage damage has been found out the key variables affecting fuselage damage.

Description

technical field [0001] The invention belongs to the field of hypersonic unmanned aerial vehicles, and in particular relates to a method for analyzing damage characteristics of a hypersonic unmanned aerial vehicle. Background technique [0002] Air-breathing hypersonic drones have become the focus of technological development in various countries because of their extremely high military application value. At the same time, due to the complex aerodynamic characteristics of UAVs flying at hypersonic speeds, the fuselage is extremely prone to fatigue damage, which accumulates continuously during the flight, endangering flight safety. Therefore, if the fatigue damage of the fuselage is not analyzed timely and accurately, and appropriate measures are not taken to slow down the evolution of the damage, the structural failure of the UAV may occur, and even the aircraft may crash. Therefore, it is of great significance to carry out research on the damage characteristics of hypersoni...

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 王玉惠李云鑫陈谋陈天培周泽宇沈艺冯星凯
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap