Detection method for damage of random vibration structure based on correlation function amplitude vector

A cross-correlation function, random vibration technology, applied in electrical digital data processing, special data processing applications, processing response signals of detection, etc., can solve problems such as damage
CN1804612AInactive Publication Date: 2006-07-19NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NORTHWESTERN POLYTECHNICAL UNIV
Publication Date
2006-07-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for testing random vibration structure damage based on cross-correlation function peak value vector. It uses the relation between the frequency respond function of the cross-correlation function of the two points respond signal of the vibration structure and the structure out-exiting frequency spectrum to collect the respond signal of a period times of a plurality of measuring points, it dose cross-correlation function computing to one point respond signal with other points respond signals, it uses the largest peak of each cross-correlation function to construct the cross-correlation function peak value vector, it compares the relative factor of the intact structure and the current structure cross-correlation function peak value vector to quote weather the structure is damaged, it analyzes the content change of the corresponding elements to ascertain the damaged location.
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Description

[0001] (1) Fields:

[0002] The invention belongs to the field of structural engineering, in particular to a random vibration structural damage detection method based on cross-correlation function amplitude vectors. (two) background technology:

[0003] Structural damage detection technology has broad application prospects in the fields of structural engineering and mechanical engineering. Most of the current structural damage detection methods are based on the identification of structural modal parameters, that is, the identification of structural modal parameters is carried out first, and then the physical parameters of the structure are calculated from the identified structural modal parameters. Detect structural damage; or directly use the identified structural modal parameters to detect structural damage. Therefore, the method and accuracy of modal parameter identification are very important in this kind of damage detection method. There are many methods for modal param...

Claims

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