Generalized displacement identification method for temperature variation hybrid monitored problem cables and supports

Abstract

A generalized displacement identification method for temperature variation hybrid monitored problem cables and supports is based on hybrid monitoring. Whether a mechanical calculation reference model of a cable structure requires to be updated is determined by monitoring cable structure temperature and environment temperature, a mechanical calculation reference model of a cable structure recording the cable structure temperature and the environment temperature is obtained, and a unit damage monitored quantity unit change matrix is obtained on the basis of the model. According to approximate linear relation between monitored quantity current numerical value vector and monitored quantity current initial numerical value vector, the unit damage monitored quantity unit change matrix, unit damage or unit generalized displacement vector and estimated object current name damage vector to be calculated, non-inferior solution of estimated object current name damage vector is calculated, so that generalized displacement of damaged cables, loosened cables and supports can be identified fast when temperature changes.

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. For convenience, this method expresses this type of structure as a "cable structure". As the ambient temperature changes, the temperature of the cable structure will also change. When the temperature of the cable structure changes, 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 refer to the coordinates of the support about the X, Y, and Z axes a...

AI Technical Summary

Problems solved by technology

In addition to being affected by the health status of the cable structure, the monitored quantity will also be affected by the temperature change of the cable structure (which often occurs). The identification of support cables and support generalized displacements with health problems is of great value to the safety of cable structures. At present, there is no public and effective health monitoring system and method to solve this problem.

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