Method for identifying damaged cable and support translation based on space coordinate monitoring during temperature change

Abstract

The invention relates to a method for identifying a damaged cable and support translation based on space coordinate monitoring during temperature change. The method comprises the following steps: based on the space coordinate monitoring, deciding whether a mechanical calculation benchmark model of a cable structure needs to be updated by monitoring the temperature of the cable structure and the environmental temperature, and obtaining the mechanical calculation benchmark model of the cable structure with the temperature of the cable structure and the environmental temperature; and on the basis of the model, calculating to obtain the unit change matrix of a unit-damaged monitored quantity. According to an approximate linear relationship among the current numerical vector of a monitored quantity, the current initial numerical vector of the monitored quantity, the unit change matrix of the unit-damaged monitored quantity, a unit-damaged or unit translation and displacement vector and the current name-damaged vector of an unknown evaluated object, the non-inferior solution of the current name-damaged vector of the evaluated object is calculated. Thus, the translation and displacement of supports and the damaged cable can be quickly identified by utilizing suitable algorithms such as a multi-objective optimization algorithm and the like during temperature change.

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, this method identifies the supporting system of the cable structure based on spatial coordinate monitoring (referring to all load-bearing cables and all supporting For the rods bearing tensile load, for the sake of convenience, this patent refers to all supporting components of this type of structure as "cable system", but in fact the cable system not only refers to supporting cables, but also includes rods that only bear tensile lo...

AI Technical Summary

Problems solved by technology

In addition to being affected by the health state of the cable system and the translational displacement of the support, the monitored quantity will also be affected by the temperature change of the cable structure (which often occurs). Under the condition that the temperature of the cable structure changes, if the monitored quantity can It is of great value to the safety of the cable structure to realize the identification of the translational displacement of the support cable and the support with health problems. At present, there is no public and effective health monitoring system and method to solve this problem.

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