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A damage identification method for lightweight high-strength beam structures

A technology for structural damage and damage identification, applied in the direction of strength characteristics, using stable bending force to test the strength of materials, instruments, etc., can solve the problems of fine damage accumulation and achieve the effect of accurate damage parameters

Active Publication Date: 2021-12-24
河北新途科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In practical engineering applications, when the structure is damaged, the slight damage will gradually accumulate when it cannot be observed with the naked eye. If it is not repaired in time, it will cause immeasurable consequences

Method used

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  • A damage identification method for lightweight high-strength beam structures
  • A damage identification method for lightweight high-strength beam structures
  • A damage identification method for lightweight high-strength beam structures

Examples

Experimental program
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Embodiment 1

[0052] In order to further illustrate the method of the present invention, the present embodiment 1 is compared with the calculation results of the frequency sensitivity method before and after adding mass,

[0053] The specific calculation steps of the present embodiment 1 are as follows:

[0054] Step (1): adopt the physical parameter (seeing table 1 below) of the beam structure used in the foregoing embodiment:

[0055] Table 1 Physical parameters of the beam structure

[0056]

[0057] Step (2): Determine the physical parameters of the beam structure, arrange acceleration sensors on the beam structure for modal analysis, figure 1 with figure 2The beam structure specimen and the arrangement of acceleration sensors are given. According to step (5) in the summary of the invention, the low-order modal parameters before and after the structural damage before the added mass are obtained; according to the step (6) in the summary of the invention, the low-order modal parame...

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Abstract

The invention relates to a damage identification method for a lightweight high-strength beam structure. The method of the invention is based on the frequency sensitivity damage equation of the added mass and the modal strain energy damage equation to obtain the comprehensive damage index of the structure, and to determine the damage location of the light and high-strength beam. and identification of damage. The damage index calculated by using the modal mode shape and modal strain energy in the present invention can accurately express the damage location and damage degree of the lightweight high-strength structure, the calculated damage parameters are more accurate, and the method for calculating the structural damage parameters is compared with the prior art more precise.

Description

technical field [0001] The invention relates to a damage identification method for a lightweight high-strength beam structure, which belongs to the technical field of structural non-destructive testing. Background technique [0002] Non-destructive testing technology is to detect the damage or defects in the structure without damaging the materials in the structure. obvious advantage. In practical engineering applications, when the structure is damaged, the subtle damage will gradually accumulate when it cannot be observed with the naked eye. If it is not repaired in time, it will cause immeasurable consequences. Structural damage identification is to obtain the modal parameters of the structure before and after damage, that is, to obtain the natural frequency and mode shape of the structure before and after damage, and then to obtain the damage parameters of each unit of the structure. [0003] When performing structural damage identification, on the one hand, it is neces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/00G01N3/20
CPCG01N3/00G01N3/20G01N2203/0023
Inventor 王龙段静波江涛路平蔚建斌邱金刚史风鸣
Owner 河北新途科技有限公司
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