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Progressive health monitoring method for cable system in cable structure based on cable force monitoring

A technology of health monitoring and cable force monitoring, applied in general control systems, control/regulation systems, instruments, etc., can solve the problems of unfavorable identification of damaged cables, the influence of health conditions, and the influence of other cable health conditions, etc.

Inactive Publication Date: 2009-07-08
JIANGSU XINTUO CONSTR GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as far as a single cable is concerned, the change of its cable force has a clear and monotonous relationship with its health status (damage degree). However, when the cable is a cable structure (especially a large cable structure, such as a large cable-stayed bridge, When one of the cable systems of a suspension bridge), since the change of the cable force of each specific cable is not only affected by its own health status, but also affected by the health status of other cables, the cable force of each specific cable is observed Even under the condition of the same health status of the cable (same damage degree or no damage), the phenomenon of the change of its cable force, which is positive and negative, large and small, will be monitored, which is very important for the identification of damaged cables. very unfavorable

Method used

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  • Progressive health monitoring method for cable system in cable structure based on cable force monitoring
  • Progressive health monitoring method for cable system in cable structure based on cable force monitoring
  • Progressive health monitoring method for cable system in cable structure based on cable force monitoring

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Embodiment Construction

[0097] 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 of cable structures. 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.

[0098] The algorithm employed by the present invention is used to monitor the health status of the cable system (all cables) in cable structures (eg large cable-stayed bridges, suspension bridges). During specific implementation, the following steps are one of various steps that may be taken.

[0099] Step 1: Determine the type, location and quantity of the quantity to be monitored, and number them. The specific process is:

[0100] First determine the numbering...

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Abstract

The invention relates to a progressive health monitoring method for a cable system in a cable structure on the basis of cable tension monitoring. On the premise of taking cable tension as the monitored value, the progressive health monitoring method considers that linear relations among a current value vector of a monitored value, an initial value vector of the monitored value, a value change matrix of the unit damage monitored value and a current nominal damage vector are approximate, and particularly nonlinear relation characteristics between the vectors are more obvious when the number of damaged cables is numerous or the damage degree is larger. The invention provides the method for piecewise approximation of nonlinear relations by the linear relations on the basis of cable tension monitoring in order to overcome the defects. The method splits a large section into a plurality of continuous subsections; the linear relations in each subsection is accurate enough; and a non-inferior solution of a current cable damage vector can be calculated in each subsection by a proper algorithm such as a multiobjective optimization algorithm, so that the position and the damage degree of a damaged cable can be accurately determined.

Description

technical field [0001] Based on the monitoring of cable force, the present invention discloses a progressive health monitoring method for identifying damaged cables in cable systems (referring to all load-bearing cables) of cable structures (especially large cable structures, such as large cable-stayed bridges and suspension bridges). A monitoring method 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 ...

Claims

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Application Information

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IPC IPC(8): G05B19/048
Inventor 韩玉林
Owner JIANGSU XINTUO CONSTR GRP
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