Dry wind tunnel aeroelastic test method

Abstract

The invention provides an aeroelasticity testing method for a dry wind tunnel. According to the method, a closed aeroelasticity testing system is utilized to test a testing model. The method comprises the steps that firstly, the closed aeroelasticity testing system is formed by a data acquisition and feedback system and an aerodynamic force generation system through a computer; afterwards, the closed aeroelasticity testing system is utilized to test the testing model; accordingly, the purpose that a simulated aircraft responds under the action of unsteady aerodynamic force is achieved. As a circuit is formed through a signal acquisition / feedback system, the influence on load distribution by structural deformation, namely the aeroelasticity influence, can be effectively simulated. Moreover, as loading equipment does not make contact with a loading model, the errors caused in a traditional ground test can be reduced.

Description

technical field [0001] The invention relates to a dry wind tunnel test on the ground, in particular to an aeroelasticity test method in a dry wind tunnel, and belongs to the field of aerospace engineering. Background technique [0002] In order to measure the structural performance of aircraft, the test method of wind tunnel test is usually used, but the cost of wind tunnel test is high, and for some special tests, the design of test model and the real simulation of flight conditions become very complicated. Therefore, some domestic and foreign researchers try to use ground tests instead of wind tunnel tests. This type of test is called a dry wind tunnel test, and conventional dry wind tunnel tests use equipment such as vibrators for loading (such as figure 1 ). [0003] However, the existing ground test methods have the following deficiencies: [0004] (1) The applied load is usually a concentrated load, which cannot accurately simulate the aerodynamic force. [0005] (...

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Problems solved by technology

[0004] (1) The applied load is usually a concentrated load, which cannot accurately simulate the aerodynamic force

[0005] (2) When loading with equipment such as a vibrator, the amplitude is small and it is impossible to achieve large-amplitude vibration

[0006] (3) It is impossible to simulate the torsion of the wing and the influence of structural deformation on the aerodynamic load, that is, to simulate the aeroelasticity

[0007] (4) The contact between the loading device and the test model will interfere with the accuracy of the test data

[0008] (5) Without signal feedback, quasi-steady aerodynamic force / unsteady aerodynamic force cannot be simulated

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