Composite material structure impacting area location method based on energy weighting factor

Abstract

The invention discloses a composite material structure impacting area location method based on an energy weighting factor, and belongs to the technical field of structure health monitoring. The method comprises the following steps of defining a characteristic parameter of the energy weighting factor according to the characteristic that a sensor is subjected to a relatively great impact influence when the sensor is relatively close to the impact position in an impact generation area, representing the degree of each sensor subjected to the impact influence in the entire impact monitoring scope, further calculating the degree of each subarea subjected to the impact influence in the monitoring scope, and finally determining a subarea subjected to the greatest impact influence as an impact generation subarea. By adopting the method, the problems that two adjacent nodes are contradicted in location and an intermediate area has a location blind area when an existing multi-node large-scale network is used for monitoring can be solved; a plurality of nodes are collectively under the impact monitoring through the networking combination, the impact location can be rapidly and accurately performed for all subareas in the network monitoring scope, and the application prospect on the aspect of the large-scale composite material structure impact monitoring is good.

Description

technical field [0001] The invention relates to a positioning method for an impact area of ​​a composite material structure, and belongs to the technical field of structural health monitoring. Background technique [0002] Compared with conventional metal materials, composite materials have the advantages of high specific stiffness, strong resistance to fatigue and corrosion, and flexible design, so they are widely used in aircraft structures. However, the low resistance of composites to impact easily leads to a substantial drop in their mechanical properties. For aircraft composite structures, shocks may occur during manufacturing, service, and maintenance, and are almost unavoidable throughout their entire life cycle. Therefore, on-board, in-line impact monitoring of aircraft composite structures is important. [0003] When the traditional structural health monitoring system performs impact monitoring, due to the pursuit of high positioning accuracy, the system often has...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome technical deficiencies and provide a method for locating the impact area of ​​composite material structures based on energy weighting factors, which can effectively solve the problem of positioning conflicts existing in the impact monitoring technology of the existing multi-monitoring node network and the intermediate For the problem that the area is difficult to locate accurately, quickly and accurately locate the area where the impact occurs

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