Health Monitoring Method of Cable System Based on Coordinate Monitoring During Bearing Angular Displacement

Abstract

The health monitoring method of the cable system based on spatial coordinate monitoring during the angular displacement of the support is based on spatial coordinate monitoring. By monitoring the angular coordinates of the structural support, it is determined whether the mechanical calculation benchmark model of the structure needs to be updated. Only when the angular coordinates of the structural support change The mechanical calculation benchmark model of the structure is updated to obtain a new mechanical calculation benchmark model of the structure that takes into account the angular displacement of the structural support. On the basis of this model, the change matrix of the unit damage monitored quantity is calculated and obtained. According to the approximate linear relationship between the current value vector of the monitored quantity and the initial vector of the monitored quantity, the change matrix of the monitored quantity per unit damage, the unit damage scalar and the current damage vector of the cable system to be obtained, a suitable multi-objective optimization algorithm can be used The algorithm quickly calculates the non-inferior solution of the current cable damage vector, based on which the position of the damaged cable and its damage degree can be determined more accurately when there is angular displacement of the support.

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, and this type of structure is expressed as a "cable structure" in the present invention for convenience. When there is an angular displacement of the support (for example, the rotation of the support around the coordinate axes X, Y, and Z is actually the coordinates of the support around the coordinate axes X, Y, and Z), the present invention identifies the cable structure based on spatial coordinate monitoring. Supporting system (referring to all load-bearing cables and all supporting rods that only bear tensile loads. For convenience, this patent refers to all supporting components of this type of structure as "cable system", but in fact the cable system It...

AI Technical Summary

Problems solved by technology

Changes in the health status of the cable system will cause changes in the measurable parameters of the structure, for example, the spatial coordinates of the cable structure will change. In fact, the change in the spatial coordinates contains the health status information of the cable system, which means that the Spatial coordinate data to determine the health status of the structure can be based on spatial coordinate monitoring (this invention refers to the monitored spatial coordinates as "monitored quantities", and the "monitored quantities" mentioned later refer to the monitored spatial coordinates) to identify affected Damaged cables, the monitored quantity is not only affected by the health status of the cable system, but also affected by the angular displacement of the cable structure support (which often occurs). At present, there is no public and effective health monitoring system and method to solve the problem. this problem