Progressive method for identifying slack cable on the basis of angle monitoring during support generalized displacement

Abstract

The invention provides a progressive method for identifying a slack cable on the basis of angle monitoring during support generalized displacement. According to angle monitoring, taking into consideration the fact that linear relationships between the current value vector of the monitored amount and an initial value vector of the monitored amount, a virtual unit damage monitored amount variation matrix and the current nominal virtual damage vector are approximate with each other through monitoring the support generalized coordinate of the structure during identifying the loose supporting cable, the invention provides a method for approaching nonlinear relation in a sectional way by using the linear relationships in order to overcome the defects. By using the method, the virtual damaged cable can be identified; after the real damaged cable is distinguished by using a nondestructive testing method and other methods, the rest virtual damaged cables are loose supporting cables; and then the cable length needing to be adjusted can be determined according to the relationship between the looseness degree and the virtual damage degree.

Description

Technical field [0001] When a broader displacement of the branch (for example, a wide range of religations of the branch refers to the angle displacement of the thread displacement of the branch along the X, Y, and Z axis around the support of the branch around the X, Y, and Z axis;The coordinates of X, Y, Z axis and the corner coordinates of the X, Y, and Z axis of the branch seat), the monitoring of the amount of the present invention based on the monitoring of the angle of the present invention to identify the cord support structure (especially the large cable structure, such as the large oblique obliqueThe cable system (referring to all support cables) in the cable system (referring to all support cables) to adjust the ropes of the cable is required, and it gives specific long -term adjustment volume, which is the field of engineering structure security. Background technique [0002] The cable system is usually a key component of the cable structure (especially the large cabl...

AI Technical Summary

Problems solved by technology

[0003] Changes in the health status of the supporting cable system (such as relaxation, damage, etc.) will cause changes in the measurable parameters of the structure, such as changes in the angular coordinates of any imaginary straight line at each point of the cable structure (such as any The change of the angular coordinate of any straight line passing through the point in the tangent plane of a point, or the change of the angular coordinate of the normal line of 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 health status of the structure can be judged by using the structural angle data, and it can be monitored based on the angle (in the present invention, the monitored angle data is called "monitored quantity", and the "monitored quantity" mentioned later refers to the monitored angle data ) to identify damaged cables. In addition to being affected by the health status of the cable system, the monitored 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 solved this problem

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