Progressive health monitoring method of cable system for spatial coordinate monitoring of bearing angular displacement

Abstract

The progressive health monitoring method of the cable system based on the spatial coordinate monitoring of the angular displacement of the support is based on the spatial coordinate monitoring. By monitoring the angular coordinates of the structural support, it is determined whether it is necessary to update the mechanical calculation benchmark model of the structure again, taking into account the current situation of the monitored quantity. The numerical vector is similar to the linear relationship between the initial numerical vector of the monitored quantity, the unit damage monitored quantity change matrix and the current nominal damage vector. The method divides the large interval into continuous small intervals. The above linear relationship is accurate enough in each small interval. In each small interval, appropriate algorithms such as multi-objective optimization algorithms can be used to calculate the current cable damage. The non-inferior solution of the vector, according to which the position of the damaged cable and its damage degree can be determined more accurately.

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 angular displacement of the support around the coordinate axes X, Y, and Z), the invention discloses a progressive method . The support system for identifying cable structures based on spatial coordinate monitoring (referring to all load-bearing cables and all supporting rods that only bear tensile loads. For convenience, this patent refers to all support components of such structures as "cable system", but i...

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 The health status of the structure can be judged by spatial coordinates, and damage can be identified 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) In addition to being affected by the health status of the cable system, the monitored quantity will also be 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 this problem. question