Device and method for testing non-linear rigidity and damping of hard coating composite structure

A composite structure and hard coating technology, which is used in measuring devices, using repetitive force/pulsation force to test the strength of materials, and measuring mechanical impedance, etc., can solve the problem of effectively identifying the nonlinear stiffness and damping of hard coating composite structures. question

Active Publication Date: 2014-01-22
NORTHEASTERN UNIV
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Problems solved by technology

In view of these characteristics of the hard-coated composite structure, the commercial vibration test system developed by the classical linear vibration theory has been unable to effectively identify the nonlinear stiffness and damping of the above-mentioned hard-coated composite structure

Method used

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  • Device and method for testing non-linear rigidity and damping of hard coating composite structure
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  • Device and method for testing non-linear rigidity and damping of hard coating composite structure

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Embodiment Construction

[0062] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0063] Such as figure 1 As shown, the device for testing the nonlinear stiffness and damping of a hard-coated composite structure in this embodiment includes: a pulse excitation device, a vibration table, a power amplifier, a data acquisition analyzer, a laser vibrometer, and a host computer;

[0064] The hard-coated composite structure is fixedly installed on the table of the vibrating table;

[0065] The output end of the pulse excitation device is connected to one input end of the data acquisition analyzer, the other input end of the data acquisition analyzer is connected to the output end of the laser vibrometer, one output end of the data acquisition analyzer is connected to the input end of the power amplifier, and the power The output end of the amplifier is connected to the vibration table, and the other output end of t...

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Abstract

The invention belongs to the field of vibration testing technology, and particularly relates to a device and a method for testing the non-linear rigidity and damping of a hard coating composite structure. The device comprises a pulse excitation device, a vibrating table, a power amplifier, a data acquisition and analysis instrument, a laser vibration measurement instrument and an upper computer, wherein the hard coating composite structure is fixedly arranged on the top of the vibrating table; an output end of the pulse excitation device is connected with one input end of the data acquisition and analysis instrument, the other input end of the data acquisition and analysis instrument is connected with an output end of the laser vibration measurement instrument, one output end of the data acquisition and analysis instrument is connected with an input end of the power amplifier, an output end of the power amplifier is connected with the vibrating table, the other output end of the data acquisition and analysis instrument is connected with the upper computer. Through the method, testing on vibration parameters of a hard coating composite structure can be efficiently completed with target, and the method is used for quantitatively evaluating the vibration reduction effect of damping of a hard coating and objectively evaluating the non-linear rigidity and damping characteristics of a hard coating composite structure.

Description

technical field [0001] The invention belongs to the technical field of vibration testing, in particular to a device and method for testing the nonlinear stiffness and damping of a hard-coated composite structure. Background technique [0002] Hard coating is a coating material made of metal base and ceramic base. It has high hardness and can resist high temperature and corrosion. In recent years, research has found that hard coating also has the effect of damping and vibration reduction. Hard coating damping and vibration reduction is especially suitable for vibration reduction of thin-walled components in aero-engines, gas turbines, steam turbines, and large centrifugal compressors. The hard coat is applied to the outer surface of the thin-walled component to form a hard coat composite structure. In order to effectively implement hard coating damping and vibration reduction, it is necessary to effectively test the stiffness and damping parameters of the hard coating compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/32G01H15/00
Inventor 孙伟韩清凯李晖罗忠翟敬宇王娇
Owner NORTHEASTERN UNIV
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