Cable structure cable system healthy monitoring method based on space coordinates monitoring

Abstract

The invention discloses a method for the health monitoring of a cable system in a cable structure on the basis of space coordinate monitoring, which carries out a plurality of times of mechanical calculation on the basis of a mechanical calculation benchmark model of a structure, and the calculation time is equal to the number of the cables. In each calculation, supposing that only one cable has unit damage, the results of all the calculation form a vector for calculating the current coordinate; a coordinate change vector is obtained by that each vector for calculating the current coordinate subtracts an initial coordinate vector; all the coordinate change vectors form the coordinate change matrix of the unit damage. According to the approximate linear relationship existing between the current coordinate vector (formed by the current actual measurement coordinates of all specified points) and the initial coordinate vector, the coordinate change matrix of the unit damage, unit damage scalar and the current cable damage vector (formed by all the current cable damage quantity), and by utilizing proper algorithms such as the multi-objective optimization algorithm, etc., the non-inferior solution of the current cable damage vector can be quickly calculated, therefore, the position and the damage degree of the damaged cable can be more accurately determined.

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 spatial coordinate 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 chang...

AI Technical Summary

Problems solved by technology

The health status of each cable will not only affect the cable force of all cables, but also affect the shape or spatial coordinates of the cable structure. There is no public report to realize the cable system by monitoring the shape or spatial coordinates of the cable structure. Systems and methods for health monitoring of

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