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Vibration damping test device possessing dry damping structure vane

A damping structure and vibration reduction test technology, applied in the testing of machine/structural components, measuring devices, vibration testing, etc., can solve the problem of difficulty in accurately predicting the vibration response of the damper with dry friction damper.

Inactive Publication Date: 2008-11-19
BEIHANG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong nonlinearity of the contact problem, certain assumptions and simplifications must be used when establishing the contact motion model, making it difficult to accurately predict the vibration response of the blade with a dry friction damper and the vibration reduction of the damper with current theoretical and numerical methods The effect needs to be verified experimentally

Method used

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  • Vibration damping test device possessing dry damping structure vane
  • Vibration damping test device possessing dry damping structure vane
  • Vibration damping test device possessing dry damping structure vane

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Embodiment Construction

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0045] A test device for a blade with a dry friction damping structure of the present invention is composed of a positive pressure loading assembly 1, a clamp assembly 4 and a base 3,

[0046] see figure 2 As shown, the base 3 includes a base frame, an L-shaped left support plate 33, and an L-shaped right support plate 34; the base frame is an integral molding, and the base plate 35 of the base frame has a left support plate 31 and a right support plate 32;

[0047] The left support plate 31 is provided with a plurality of A positioning holes 311, and the A positioning holes 311 are used to install the L-shaped left support plate 33 on the B face 312 of the left support plate 31 through the cooperation of the screw and the nut, and the L-shaped left support plate 31 The support plate 33 is placed opposite to the L-shaped right support plate 34;

[0048]The...

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Abstract

The invention discloses a vibration reduction testing apparatus with a dry friction damping structure blade, the vibration reduction testing apparatus is composed of a positive pressure loading component, a fixture component and a base seat, the fixture component is mounted on a bottom plate of the base seat, the positive pressure loading component is arranged on a left supporting plate and a right supporting plate of the base seat, and a shroud of a blade with a dry friction damping structure is in contact with a friction block A and a friction block B on the positive pressure loading component. After loading the initial positive pressure and the exciting load, the vibration reduction testing apparatus of the invention can test vibration characteristics of different exciting forces, different initial positive pressures, different contact angles of a test piece (namely, the blade with the dry friction damping structure) and different installation positions of the test piece, and can utilize the test results to analyze the influence law of important parameters such as contact surface positive pressures of the test piece, contact angles of the test piece and installation positions of the test piece on the vibration reduction effect of the dry friction damping structure.

Description

technical field [0001] The invention relates to a vibration test device, in particular to a vibration reduction test device suitable for a blade with a dry friction damping structure. Background technique [0002] Dry friction damping technology is a very effective vibration reduction method between blades. Practice has proved that using damping nodes to increase structural damping is a very economical and effective method. It can not only weaken the vibration stress of blades, but also increase the blade system. Aeroelastic stability. In an aeroengine, the blade's ability to withstand vibrational stresses due to resonance or flutter is almost entirely dependent on the effect of interfacial dry friction damping. According to the data, 90% of the damping in a composite structure comes from its joints, and the damping characteristics of the joints come from the dry friction between the joints. Due to the insensitivity of dry friction damping to temperature changes, simple st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
Inventor 洪杰马艳红陈璐璐朱彬杨鑫
Owner BEIHANG UNIV
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