Progressive identification method for slack cables based on hybrid monitoring of angular support displacement and temperature change

A support angular displacement, progressive identification technology, applied in the application of thermometers, thermometers, measuring devices, etc., can solve the problems of structural temperature changes (which often occur) and cable structure support angular displacement
CN102735462AInactive Publication Date: 2012-10-17SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHEAST UNIV
Publication Date
2012-10-17
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a progressive identification method for slack cables based on hybrid monitoring of angular support displacement and temperature change. The progressive identification method can be used for deciding whether to update a mechanical calculation reference model of a cable structure through monitoring angular support displacement, a cable structure temperature, an environment temperature and a heath degree of a support cable. A noninferior solution of a current nominal damage vector is rapidly figured out according to an approximate linear relationship existing among a current value vector of a monitored quantity, a current initial value vector of the monitored quantity, a unit damage monitored quantity change matrix and a to-be-solved current nominal damage vector and by virtue of a multi-objective optimization algorithm and the like, therefore, virtual damaged cables can be identified when the angular support displacement and the temperature change exist, and after an actual damaged cable is identified by methods of nondestructive testing and the like, remained virtual damaged cables are the slack support cables; and the to-be-regulated cable lengths of the slack support cables can be determined according to a mechanical equivalent relationship.
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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 convenience, this method expresses this type of structure as a "cable structure". As the ambient temperature changes, the temperature of the cable structure will also change. When the temperature of the cable structure changes, the angular displacement of the support (such as the rotation of the support around the coordinate axes X, Y, and Z is actually the support angular displacement around the coordinate axes X, Y, Z), this method is based on hybrid monitoring to identify the support system of the cable structure (referring to all load-bearing cables, and all supporting members that only bear tensile loads, for convenience , this patent refers to all s...

Claims

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