Self-diagnosis system for wind-induced cumulative fatigue damage of pull lug node substructure of mast structure

A self-diagnosis system and fatigue damage technology, applied in the testing of machines/structural components, material analysis using acoustic wave emission technology, measuring devices, etc., can solve the problems of fatigue crack warning and timely repair that cannot be accumulated
CN101825522AInactive Publication Date: 2010-09-08WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2010-09-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a self-diagnosis system for wind-induced cumulative fatigue damages of a pull lug node substructure of a mast structure. The system comprises a displacement measuring apparatus, a pull rope tension determination module, a welding residual stress determination module, a pull lug substructure wind-induced stress field determination module, a fatigue crack initiation degree real-time analysis module and a man-machine interaction interface, so that the system can timely inform a user of the degree of the cumulative fatigue at the danger point position of the pull lug node substructure of the mast structure and the time when the cumulative fatigue crack initiation occurs and make early warning on cumulative fatigue cracks when the pull lug node substructure of the mast structure is in a good condition. In addition, the system also comprises an acoustic emission sensor, a strain transducer, a fatigue crack growth determination module and an ultimate crack length and fracture analysis module, so that the system can timely inform the user of the degree of the cumulative fatigue crack growth and the time when the fracture occurs, timely repair the crack and ensure the safety of the mast structure when the cumulative fatigue cracks of pull lug node substructure of the mast structure occur.
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Description

technical field

[0001] The invention relates to the field of towering structure engineering, in particular to a self-diagnosis system for accumulative fatigue damage caused by wind of a lug node substructure of a mast structure. Background technique

[0002] The mast structure is a support structure type commonly used for transmitting information in communication engineering. In the actual application process, the mast structure will be subjected to the long-term effect of wind force. The initiation of cumulative fatigue cracks may even cause the fracture and collapse of the mast structure. Considering that the initiation of cumulative fatigue cracks is a cumulative effect, the lug node substructure of the mast structure has no symptoms for the entire period of time before the cumulative fatigue crack initiation, so it is impossible to know when cumulative fatigue cracks will occur, and it is impossible to determine Early warning and timely repair of accumulated fatigue cra...

Claims

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