Angle monitoring based cable system health monitoring method applied in supporting seat generalized displacement

Abstract

The invention discloses an angle monitoring based cable system health monitoring method applied in supporting seat generalized displacement. The need of updating a mechanical calculation reference model of a structure is decided by monitoring the supporting seat generalized coordinates of the structure, based on angle monitoring, and the mechanical calculation reference model of the structure is updated only when the supporting seat generalized coordinates of the structure vary, so that a new mechanical calculation reference model of the structure included in the supporting seat generalized coordinates of the structure is obtained, and a unit damage monitored quantity variance matrix is obtained by calculating on the basis of the model. A noninferior solution of a current cable damage vector can be calculated quickly with appropriate algorithms such as a multi-target optimization algorithm and the like according to approximate linear relations between a current numeric vector of a monitored quantity and an initial vector of the monitored quantity, the unit damage monitored quantity variance matrix, a unit damage scalar quantity and a cable system current damage vector to be resolved, so that the position and damage degree of the damaged cable can be determined accurately relatively when supporting seat generalized displacement occurs.

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 a generalized displacement of the support (for example, the generalized displacement of the support refers to the linear displacement of the support along the X, Y, and Z axes and the angular displacement of the support around the X, Y, and Z axes; corresponding to the generalized displacement of the support, the generalized coordinates of the support Refers to the coordinates of the support about the X, Y, and Z axes and the angular coordinates of the support about the X, Y, and Z axes), the present invention identifies the support system of ...

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, such as changes in the angular coordinates of any imaginary straight line passing through each point of the cable structure (such as any one of the tangent planes at any point on the surface of the structure the change of the angular coordinate of the straight line passing through the point, or the change of the angular coordinate of the normal line at any point on the surface of the structure), in fact, the change of the structural angle contains the health status information of the cable system, that is to say, the structural angle data can be used to judge The health status of the structure can be based on angle monitoring (this invention refers to the monitored angle data as "monitored quantity", and the "monitored quantity" mentioned later refers to the monitored angle data) to identify damaged cables, and the monitored In addition to being affected by the health status of the cable system, the quantity will also be affected by the generalized 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.