A Thin-Wall Model Double-Beam Hinged Structure and Dynamic Test Support Method

Abstract

A thin-walled model double-beam hinged structure and a dynamic test support method, wherein the hinged structure includes: a pole fixing sleeve, two elastic beams, a model fixing flap, a model support sleeve, a pole; a pole fixing sleeve, an elastic beam, The model fixing flap is integrated processing, two elastic beams are placed in parallel on the same plane, the rod fixing sleeve and the model fixing flap are respectively connected to the two ends of the elastic beam; Fixing: the model support sleeve is fixed with the test model, so as to realize the elastic fixation of the test model relative to the pole. This hinged structure can more accurately simulate the vibration mode of the model, thereby achieving the purpose of improving the test accuracy and increasing the accuracy of the wind tunnel test simulation.

Description

technical field [0001] The invention relates to a thin-walled model (generally less than 2mm) double beam hinged structure, which belongs to the field of aerospace engineering. Background technique [0002] When carrying out some dynamic wind tunnel tests, it is necessary to design the model and provide elastic hinged fixed support for the model. The support position is usually the node position of the mode shape of the model vibration, and the model can rotate but cannot be translated at the node position. Usually, the design method of the model support is: use the flange plate to fix the model and the support rod. [0003] Such as figure 1 , 2 As shown, the existing model supporting and fixing structure includes: 1 support rod, 2 fixing flange, 3 model fixing screws / pins, 4 test model and other parts. Among them, part of the fixed flange is processed integrally with the test model, and part is processed integrally with the support rod, and the test model is fixed on the...

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Problems solved by technology

[0005] (1) The model is fixed by fixed support, which cannot simulate the hinge condition of the aircraft and the dynamic characteristics of the model

[0006] (2) The existing model fixing method usually fixes the solid model, but for the thin-walled model, due to the small rigidity and strength of the thin-walled model, the connection between the model and the flange is prone to deformation

[0007] (3) For the multi-node fixed model, the fixed position of the strut is determined, and each test needs to design and process related models and struts, which increases the processing cost of the model

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