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

Abstract

The invention discloses a hybrid monitoring based cable system health 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 hybrid 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 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 line at each point of the structure (for example, changes in the angular coordinates of any straight line passing through the tangent plane at 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 Changes), 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. The present invention combines all the 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. In addition to being affected by the health status of the cable system, the monitored quantities also have It will be affected by the generalized displacement of the cable structure support (which often occurs), and there is no public and effective health monitoring system and method to solve this problem