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Dynamic damage identification method for structural sealant under reference-model-free condition

A damage identification and sealant technology, which is applied to the analysis of solids, instruments, and materials using sonic/ultrasonic/infrasonic waves to achieve the effects of fast detection, easy operation, and simple experimental installation.

Active Publication Date: 2021-04-02
UNIV OF SCI & TECH BEIJING
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a dynamic damage identification method for structural sealants without a reference model, to solve the defect in the prior art that an initial non-damaged reference model is required for damage detection, and the present invention does not require an initial non-damaged reference model Dynamic damage detection of structural sealants can be realized

Method used

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  • Dynamic damage identification method for structural sealant under reference-model-free condition
  • Dynamic damage identification method for structural sealant under reference-model-free condition
  • Dynamic damage identification method for structural sealant under reference-model-free condition

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] Embodiments of the present invention provide a dynamic damage identification method for structural sealants without a reference model, such as figure 1 As shown, the method includes the following steps:

[0036] Take the same kind of glass panel units to be tested as a set, and each glass panel unit in the set as a sample, use the same hammer test to measure the acceleration and hammer signal for each sample j, and calculate the acceleration frequency response function H j (ω k );

[0037] Calculate the sample acceleration frequency response function H j (ω k ) norm normalized frequency response function all in the set The average frequency response function of and calculate relative to The accumulative difference ...

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Abstract

The invention discloses a dynamic damage identification method for a structural sealant under a reference-model-free condition, and the method comprises the steps of: employing a same hammering experiment to measure an acceleration and a force hammer signal of a similar glass panel unit, and calculating an acceleration frequency response function; normalizing the acceleration frequency response functions of all the samples, solving an average acceleration frequency response function, and calculating the accumulated difference of the acceleration frequency response functions of all the samples;solving an acceleration frequency response function cumulative difference unilateral confidence level upper limit, and identifying an abnormal sample according to the unilateral confidence level upper limit; and judging the damage condition of the glass panel unit according to the peak frequency difference of the abnormal sample. According to the method, individual units with structural sealant damage in the same kind of glass panel units can be quickly identified without an initial non-damage reference model, and the method has the advantages of simple experimental installation, easy operation, high detection speed and the like.

Description

technical field [0001] The invention relates to the technical field of glass curtain wall damage detection, in particular to a dynamic damage identification method for structural sealant without a reference model. Background technique [0002] Hidden frame and semi-hidden frame glass curtain wall are often used in various building envelopes due to their beautiful and simple appearance. Among them, the support device composed of structural sealant, rubber strip, etc. is a concealed project. Once damaged, the panel unit may fall off and cause a safety accident. [0003] In order to ensure the firmness of the installation of the glass panel unit in the curtain wall, it is necessary to regularly check its use status. Pan Danguang, Jiang Kun, Zhang Xichen, Wang Hongtao, Zheng Heng, and Hu Naidong disclosed a damage detection method for glass curtain wall structural sealant under a benchmark model in the patent "Damage Identification Method for Glass Curtain Wall Boundary Structu...

Claims

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Application Information

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IPC IPC(8): G01N29/04
CPCG01N29/04G01N2291/0232G01N2291/0235
Inventor 潘旦光江坤
Owner UNIV OF SCI & TECH BEIJING
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