Cable force monitoring based damaged cable recognizing method applied in supporting seat generalized displacement

Abstract

The invention discloses a cable force monitoring based damaged cable recognizing method applied in the 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 cable force 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

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 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