Longitudinal freedom degree simulation full aircraft flutter wind tunnel model support system

Abstract

The invention relates to a longitudinal freedom degree simulation full aircraft flutter wind tunnel model support system and belongs to the technical field of aeroelasticity tests. The longitudinal freedom degree simulation full aircraft flutter wind tunnel model support system comprises a support beam rack and a model suspension device, wherein the model suspension device is arranged on the support beam rack and is used for suspending a flutter model, a model suspension device can be arranged on a main beam rack in a sliding manner, and displacement of the model suspension device along an axis of the main beam rack can be restricted via an ups and downs brake block arranged on a lateral part of the model suspension device; the model suspension device also comprises a pitching brake block and a model suspension shaft, the model suspension shaft is used for suspending the flutter model so as to make the flutter model rotate around the model suspension shaft, the pitching brake block can press tightly on or get away from the flutter model, and therefore pitching angle displacement of the model suspension device can be restricted. According to the longitudinal freedom degree simulation full aircraft flutter wind tunnel model support system, freedom of a full aircraft flutter in an up and down direction and a pitching direction in a wind tunnel can be realized via the ups and downs brake block and the pitching brake block, and therefore a real flight state of an aircraft can be simulated.

Description

technical field [0001] The invention belongs to the technical field of aeroelasticity test, and in particular relates to a whole machine flutter wind tunnel model support system for simulating longitudinal degrees of freedom. Background technique [0002] When the flight reaches a certain speed, due to the interaction of aerodynamic and structural elastic vibrations, the aircraft will undergo a self-excited vibration called flutter, most of which will cause disastrous consequences. For example, the wings and tail of an airplane break down in seconds. This prompted the aeronautical engineering community to first carry out theoretical and experimental research on flutter, and this work was listed as an important link in the aircraft design work. [0003] The wind tunnel test of the full-aircraft flutter model generally adopts the support of multi-degree-of-freedom direction movement. In addition to supporting the aircraft model, this support should also ensure that the aircra...

AI Technical Summary

Problems solved by technology

In the prior art, the model support system usually adopts a spring suspension system and a double-cable suspension system, but when the first-order natural frequency of the model is very low, it is difficult to meet the requirements of the support frequency, and it is not suitable for active control of flutter and load mitigation Wait for the test

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