Health monitoring method of cable system based on mixed monitoring in presence of support seat settlement

Abstract

The invention relates to a health monitoring method of a cable system based on mixed monitoring in the presence of support seat settlement. Whether a mechanical calculation standard model with an updated structure is needed or not is determined on the basis of mixed monitoring through monitoring the coordinates of a structural support seat, and the structure of the mechanical calculation standard model needs to be updated only when the coordinates of the structural support seat are changed, so a novel mechanical calculation standard model with the structure metered into the settlement of the structure support seat is obtained, and the unit damage monitored quantity change matrices are obtained through the calculation on the basis of the model. According to the approximate linear relationship of the monitored current value vector and the monitored initial vector, unit damage monitored quantity change matrices, unit damage scalar quantity and current damage vector of the cable system to be solved, proper algorithms such as the multi-objective optimization algorithm and the like can be utilized for fast calculating the noninferior solution of the current cable damage, and thereby, the position and the damage degree of the damaged cable can be accurately determined in the presence of the support seat settlement.

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 support settlement, the present invention identifies the supporting system of the cable structure based on mixed monitoring (referring to all load-bearing cables and all supporting rods that only bear tensile loads. For convenience, this patent refers to this type of structure as All the supporting parts of the system are collectively referred to as "cable system", but in fact the cable system not only refers to the supporting cables, but also includes the damaged cables in the rods that only bear tensile loads (for truss structures, it refers...

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 cable force, the deformation or strain of the cable structure, the shape or spatial coordinates of the cable structure, and the Changes in the angular coordinates of any imaginary straight line at each point of the structure (for example, changes in the angular coordinates of any straight line passing through the point in the tangent plane of any point on the surface of the structure, or changes in the angular coordinates of the normal line at any point on the surface of the structure change), all of these changes include the health status information of the cable system, so the health status of the structure can be judged through the mixed monitoring of the changes in the characteristic parameters of these different types of structures, and the present invention combines all monitored structural features The parameters are collectively referred to as "monitored quantities". Since the monitored quantities are composed of different types of measurable parameters of the structure, the present invention calls this mixed monitoring. The monitored quantities are not only affected by the health status of the cable system, but also Will be affected by the settlement of the cable structure support (which often occurs), and there is no public and effective health monitoring system and method to solve this problem

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