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Flutter model protection structure based on fiber material

A technology of flutter model and protective structure, applied in the field of flutter model protective structure

Inactive Publication Date: 2021-10-01
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There has been no previous approach to protecting against secondary damage from unavoidable damage scenarios

Method used

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  • Flutter model protection structure based on fiber material
  • Flutter model protection structure based on fiber material

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Embodiment Construction

[0019] In order to make the purpose, technical solution and advantages of the application more clear, the technical solution in the embodiment of the application will be described in more detail below in conjunction with the drawings in the embodiment of the application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the application. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application. Embodiments of the present application will be described in detail below in conjunction with th...

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Abstract

The invention belongs to the field of aeroelastic model design, and particularly relates to a flutter model protection structure based on a fiber material. The flutter model protection structure comprises a flutter model and a protection part, wherein the flutter model comprises a metal structure and a non-metal structure; and the protection part is made of fibers or a fiber bundle material, the protection part connects the metal structure of the flutter model in a winding and / or knotting mode, and the protection part cannot be tensioned when the flutter model vibrates. According to the flutter model protection structure based on the fiber material, the high-strength, high-flexibility and low-density fiber or fiber bundle material is selected as the protection piece, the metal structure of the flutter model is connected in a loose winding and knotting mode, adhesion with other structures is avoided in cooperation with the release agent, and during model design and processing, the parts needing to adopt the protective structure are designed. According to the flutter model protection structure, secondary damage caused by wind tunnel test damage of the flutter model can be effectively prevented.

Description

technical field [0001] The application belongs to the field of aeroelastic model design, in particular to a fibrous material-based flutter model protection structure. Background technique [0002] During the design and development stage of the aircraft, a number of flutter wind tunnel tests will be carried out, and the flutter models obtained based on similar ratios will be used in the tests. One of the characteristics of the flutter test is that when the wind speed reaches the flutter point, the model will experience significant structural vibration. For sudden flutter, the vibration of the model diverges quickly, and the vibration amplitude increases rapidly with time. If it cannot be improved in time, the final Structural damage will occur. This kind of structural damage often occurs in flutter tests, and the broken structure has the risk of causing secondary damage to the inner wall of the wind tunnel and the downstream mechanism of the airflow. [0003] At present, pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/08B64F5/60
CPCG01M9/08B64F5/60
Inventor 于佳鑫王赫喆王标张桂江戴文鸣
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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