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Fixed airfoil flutter ground test device and method

A ground test, fixed-wing technology, applied in the direction of measuring device, vibration test, machine/structural component test, etc., can solve the problems of high cost, difficulty, model damage, etc., and achieve low operating cost, convenient operation, and simple structure Effect

Pending Publication Date: 2021-05-28
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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Problems solved by technology

[0002] At present, laboratory verification technologies for flutter characteristics at home and abroad mainly include model flutter wind tunnel tests and dry wind tunnel flutter ground tests, both of which have limitations. Model flutter wind tunnel tests need to provide stable wind speed flow fields. The cost is high, and it is difficult to reduce the wind speed immediately, and it is easy to cause damage to the model; the dry wind tunnel ground test needs to simulate the effect of aerodynamic force through efficient numerical calculation and the use of vibration exciter loading. Exploration and research stage, maturity is not high

Method used

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  • Fixed airfoil flutter ground test device and method
  • Fixed airfoil flutter ground test device and method

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Embodiment Construction

[0023] The flutter ground test device designed here mainly includes five parts: ground power system, test installation platform, airfoil test bench, dynamic balance adjustment system, and test system, see attached figure 1 , 2 .

[0024] The ground power system includes a base 1 fixed to the ground, a motor 2 that provides rotational power, a rotating shaft 3 that drives the platform to rotate, and a rotational frequency controller 4 that adjusts the rotational frequency;

[0025] The test installation platform includes a rotating platform 5 interconnected with the rotating shaft 3, and the rotating platform 5 is provided with a sliding adjustment groove 6 that can adjust the installation position of the test piece;

[0026] The airfoil test bench includes a sliding base 7 installed on the test installation platform 5, the sliding base 7 is provided with an angle adjustment groove 8 that can adjust the installation angle of the test piece, and the flutter test sample 9 is ver...

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Abstract

The invention belongs to the technical field of aeroelasticity. The invention designs a fixed airfoil flutter ground test device and method. The device comprises a ground power system, a test installation platform and an airfoil test bench. The test installation platform is installed on the ground power system, the ground power system provides horizontal plane rotating power for the test installation platform, the airfoil test bench is installed on the test installation platform, the distance between the airfoil test bench and a rotating shaft and the angle of the airfoil test bench are adjustable, and a flutter test sample 9 is installed on the airfoil test bench. Ground test verification of flutter characteristics of fixed airfoils such as aircraft wings can be realized under non-wind tunnel test conditions, variable parameter test research in different states can be realized through adjustment of rotation frequency, installation angle and rotation radius, and real-time safety protection of an airfoil is realized through signal association between a test system and the ground power system.

Description

technical field [0001] The invention belongs to the technical field of aeroelasticity. Background technique [0002] At present, laboratory verification technologies for flutter characteristics at home and abroad mainly include model flutter wind tunnel tests and dry wind tunnel flutter ground tests, both of which have limitations. Model flutter wind tunnel tests need to provide stable wind speed flow fields. The cost is high, and it is difficult to reduce the wind speed immediately, and it is easy to cause damage to the model; the dry wind tunnel ground test needs to simulate the effect of aerodynamic force through efficient numerical calculation and the use of vibration exciter loading. In the stage of exploration and research, the maturity level is not high. Therefore, in order to evaluate the flutter characteristics of the aircraft lifting surface efficiently and accurately, it is necessary to design a fixed-wing surface flutter ground test device, which can realize the...

Claims

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Application Information

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IPC IPC(8): G01M7/02
CPCG01M7/02G01M7/025
Inventor 赵冬强杨智春黄国宁马翔
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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