Progressive identification method of damaged line and support angle displacement based on temperature change and spatial coordinate monitoring

Abstract

A progressive identification method of damaged line and support angle displacement based on temperature change and spatial coordinate monitoring is based on spatial coordinate monitoring, and the method comprises the steps of: monitoring the support angle displacement, the line structure temperature, the environmental temperature and the damage degree of the damaged line to determine whether to update the mechanical calculation benchmark model of the line structure, obtaining a new mechanical calculation benchmark model of the line structure reckoning in the support angle displacement, the damage degree of the damaged line and the temperature, and accurately identifying the damaged line and the support angle displacement in the existence of temperature change according to the approximate linear relationship of the current numeric vector of the monitored quantity, the current initial numeric vector of the monitored quantity, the monitored quantity numeric unit change matrix of unit damage and the current nominal damage vector to be calculated on the basis of the model.

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 spatial coordinate monitoring to identify the support system of the cable structure (referring to all load-bearing cables, and all supporting rods that only bear tensile loads, for convenience For the sake of cons...

AI Technical Summary

Problems solved by technology

In addition to being affected by the health status of the cable system and the angular 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 support cable and the angular displacement of 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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