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Method for recognizing concentrated loads of damaged cable progressively under condition of generalized displacement based on hybrid monitoring

A progressive identification and mixed monitoring technology, applied in the direction of measuring force, measuring device, measuring heat, etc.

Inactive Publication Date: 2014-03-05
SOUTHEAST UNIV
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  • Claims
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Problems solved by technology

[0005] When the support has a generalized displacement, some of the currently disclosed technologies and methods can only identify the change of the structure's load when all other conditions remain unchanged (only the load on the structure changes), and some can only identify the change in all other conditions. Recognizes changes in structural health all other things being equal (only structural temperature and structural health change) Recognizes structural (ambient) temperature and structure Changes in the health state, there is currently no public and effective method that can simultaneously identify changes in the structural load, structural (environment) temperature, and structural health state, or in other words, the load on the structure and the structural (environment) temperature at the same time When changing, there is no effective method to identify changes in the structural health status, and the load on the structure and the structure (environment) temperature often change, so how to eliminate the load when the load on the structure and the structure (environment) temperature change Changes and structural temperature changes on the health status identification results of cable structures, so as to accurately identify the changes in the health status of the structure, is an urgent problem to be solved at present. This method discloses a method. When the support has a generalized displacement, When the concentrated load borne by the cable structure and the structural (environmental) temperature change, the impact of the generalized displacement of the support, load change and structural temperature change on the health status identification of the cable structure can be eliminated, and the damaged cable can be identified based on the monitoring of the monitored quantity. , which is of great value to the safety of the cable structure
[0006] Similarly, in the currently disclosed methods, there is no method that can eliminate the influence of the generalized displacement of the support, the temperature change of the structure, and the health state of the support cable, so as to realize the correct identification of the change degree of the concentrated load. For the structure, the load It is also very important to identify changes

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  • Method for recognizing concentrated loads of damaged cable progressively under condition of generalized displacement based on hybrid monitoring
  • Method for recognizing concentrated loads of damaged cable progressively under condition of generalized displacement based on hybrid monitoring
  • Method for recognizing concentrated loads of damaged cable progressively under condition of generalized displacement based on hybrid monitoring

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Embodiment Construction

[0140] Aiming at the problem of cable structure health monitoring, this method realizes two functions that cannot be possessed by existing methods, namely: 1. When the cable structure undergoes a generalized displacement of the support, the concentrated load on the structure and the temperature change of the structure (environment) When , the effects of the generalized displacement of the cable structure support, the concentrated load change and the structure temperature change on the identification results of the cable structure health state can be eliminated, so as to accurately identify the structural health monitoring method of the damaged cable; When the cable is damaged, the change of the concentrated load can also be identified at the same time, that is, the method can eliminate the influence of the generalized displacement of the cable structure support, the structural temperature change and the health state change of the supporting cable, and realize the correct identif...

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Abstract

Disclosed is a method for recognizing concentrated loads of a damaged cable progressively under the condition of generalized displacement based on hybrid monitoring. Based on hybrid monitoring, whether a mechanical calculation reference model of a cable structure needs updating or not is determined by monitoring the generalized displacement of a support, the temperature of the cable structure, an environment temperature, the variation degree of the concentrated loads and the damage degree of the damaged cable to obtain a new mechanical calculation reference model, where the generalized displacement of the support, the variation degree of the concentrated loads, the damage degree of the damaged cable and the temperatures are reckoned, of the cable structure, and the approximately-linear relation between a current numerical value vector of a monitored quantity and a current initial numerical value vector of the monitored quantity, a unit damage monitored quantity numerical value change matrix and a current nominal damage vector to be worked out is acquired based on the new mechanical calculation reference model. In this way, under the condition of the generalized displacement of the support and temperature variation, influences of interference factors can be eliminated so as to recognize the damaged cable and the variation of the concentrated loads accurately.

Description

technical field [0001] Cable-stayed bridges, suspension bridges, truss structures and other structures have one thing in common, that is, they have many parts that bear tensile loads, such as cable-stayed cables, main cables, slings, tie rods, etc. , cables, or rods that only bear tensile loads are supporting components. For the sake of convenience, this method expresses this type of structure as The rods under tension or axial compression loads (also known as two-force rods) are collectively referred to as "cable systems" for convenience, and the term "supporting cables" is used in this method to refer to bearing cables, bearing cables and A member that bears axial tension or axial compression load is sometimes referred to as a "cable", so when the word "cable" is used later, it actually refers to a two-force member for a truss structure. During the service process of the structure, the correct identification of the health state of the supporting cables or the cable system i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M99/00G01L1/00G01B21/02G01K13/00
Inventor 韩玉林宋佰涵韩佳邑
Owner SOUTHEAST UNIV
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