Cable system health monitoring method based on strain monitoring cable structure

A technology for health monitoring and strain monitoring, applied in the field of damaged cables, can solve problems such as affecting cable force, affecting cable structure deformation or strain, etc.

Inactive Publication Date: 2008-12-31
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The health status of each cable will not only affect the cable force of all cables, but also affect the deformation or strain of the cable structure. There is

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  • Cable system health monitoring method based on strain monitoring cable structure
  • Cable system health monitoring method based on strain monitoring cable structure
  • Cable system health monitoring method based on strain monitoring cable structure

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Embodiment Construction

[0053] Aiming at the health monitoring of cable systems of cable structures (especially large cable structures, such as large cable-stayed bridges and suspension bridges), the present invention discloses a method that can reasonably and effectively monitor the health status of each cable in the cable system in the cable structure. systems and methods. The following descriptions of embodiments of the invention are merely exemplary in nature, and are in no way intended to limit the application or uses of the invention.

[0054] The present invention employs an algorithm for monitoring the health status of the cable system (all cables) in cable structures, especially large cable structures, such as large cable-stayed bridges, suspension bridges. During specific implementation, the following steps are one of various steps that may be taken.

[0055] The first step: Determine the numbering rule of the cable, and number all the cables according to this rule. This number will be us...

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Abstract

The invention discloses a health monitoring system of a cable system in a cable structure on the basis of strain monitoring; a plurality of times of mechanical calculation is carried out on the basis of the reference model of the mechanical calculation of a structure, the times of the calculation is equal to the number of cables. Supposing that only one cable has unit damage during each calculation, the calculation result of each time constitutes a current strain calculation vector; a strain change vector is obtained by that each current strain calculation vector minus an initial strain vector; all the strain change vectors constitute a unit damage strain change matrix. According to the similar linear relation between the current strain vector (constituted by the current measured strain of all the given points) and the initial strain vector, the unit damage strain change matrix, an unit damage scalar and a current cable damage vector (constituted by current damage amount of all cables), the noninferior solution of the current cable damage vector can be figured out fast by utilizing the suitable algorithms of multi-objective optimization algorithm, etc., therefore, the position and the degree of damage of the damaged cable can be determined accurately.

Description

technical field [0001] The invention identifies damaged cables in cable systems (referring to all bearing cables) of cable structures (especially large cable structures, such as large cable-stayed bridges and suspension bridges) based on strain monitoring, and belongs to the field of engineering structure health monitoring. Background technique [0002] The cable system is usually a key component of the cable structure, and its failure often leads to the failure of the entire structure. Based on structural health monitoring technology to identify cable systems (especially large cable structures, such as large cable-stayed bridges, suspension bridges) in the cable system The damaged cable is a method with great potential. At present, the structural health monitoring technology mainly monitors the cable force, and identifies the damaged cable and its damage degree according to the change of the cable force. However, as far as a single cable is concerned, the change of its cab...

Claims

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Application Information

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IPC IPC(8): G01B21/32G01M19/00G06F17/10G01M99/00
Inventor 韩玉林
Owner SOUTHEAST UNIV
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