Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Structural damage identification method based on ridge estimation and L curve method

A technology for structural damage and identification methods, applied in computing, instrumentation, electrical and digital data processing, etc.

Inactive Publication Date: 2014-07-02
CHONGQING UNIV
View PDF1 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) It is difficult to solve the ill-conditioned damage problem by directly inverting the strain energy sensitivity damage equation;
[0005] 2) When the simple truncated singular value decomposition algorithm is used to deal with the problem of strain energy sensitivity damage equation, it is difficult to determine the appropriate truncation error, which easily leads to the problem of poor recognition accuracy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Structural damage identification method based on ridge estimation and L curve method
  • Structural damage identification method based on ridge estimation and L curve method
  • Structural damage identification method based on ridge estimation and L curve method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0057] The purpose of the present invention is to propose a new method for solving the strain energy sensitivity damage equation, and provide an improved strategy to improve the accuracy of damage identification. This method can not only deal with the ill-conditioned problem of the damage equation, but also improve the accuracy of damage identification through the correction strategy for the deviation of the estimated value. Since the Ridge Estimation (RE) method can better deal with ill-conditioned problems, and the L-curve method can better deal with the selection of optimization parameters, the present invention uses a combination of Ridge Estimation and L-curve method to solve the ill-conditioned problem of the damage equation and The selection of optimization parameters. For specific implementation ideas, please refer to figure 1 ,From figure 1It can be seen that this method mainly uses the modal strain energy sensitivity damage equation and the ridge estimation method ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a structural damage identification method based on ridge estimation and an L curve method. The structural damage identification method comprises the steps of firstly, building a structural damage equation based on sensitivity of modal strain energy according to the sensitivity of the structural modal strain energy, then determining a basic estimation criterion of the ridge estimation according to the principle of Tikhonov regularization, then utilizing the L curve method for determining the optimal ridge parameter of the ridge estimation, working out the basic solution of the structural damage equation on the basis of the optimal ridge parameter, and finally correcting the result, so that the damage coefficient of a damage unit is obtained, and the structural damage is identified. According to the structural damage identification method based on the ridge estimation and the L curve method, by the adoption of the ridge estimation, the influence of an ill-conditioned problem on damage identification can be greatly reduced, the quasi-optimal ridge parameter is determined by the adoption of the L curve method, meanwhile, a correcting strategy for the ridge estimation is provided, and therefore the better damage estimation value is obtained.

Description

technical field [0001] The invention relates to structural damage identification, in particular to a structural damage identification method based on ridge estimation and L-curve method, which belongs to the structural damage detection technology. Background technique [0002] After the engineering structure is put into use, due to the effect of the environment, various damages often occur. Severe damage to the structure will cause the collapse or failure of the building, resulting in huge economic losses and personnel safety. Therefore, the identification of structural damage has always been a research hotspot in the world. It is more effective to use the change of dynamic characteristics before and after the damage to establish the corresponding damage equation, so as to solve the damage coefficient. According to the damage coefficient, the damage degree of the structure can be judged. However, in engineering practice, the test data will inevitably be disturbed by measur...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 郭惠勇
Owner CHONGQING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products