Progressive health monitoring method of cable system based on cable force monitoring during bearing angular displacement

Abstract

The progressive health monitoring method of the cable system based on the cable force monitoring during the angular displacement of the support is based on the cable force 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 again, taking into account the monitored quantity. The current 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 relationship method divides the large interval into continuous small intervals. The above-mentioned linear relationship is accurate enough in each small interval. In each small interval, a suitable algorithm such as a multi-objective optimization algorithm can be used to calculate the current index. The non-inferior solution of the damage 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 cable force 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 in fact ...

AI Technical Summary

Problems solved by technology

After the health state of the cable system changes, it will cause the change of the measurable parameters of the structure, such as the change of the supporting cable force. In fact, the change of the cable force contains the health state information of the cable system, that is to say, the cable force can be used Data to determine the health status of the structure can be based on cable force monitoring (this invention refers to the monitored cable force as "monitored quantity", and the "monitored quantity" mentioned later refers to the monitored cable force) to identify 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 this problem