Impact monitoring and energy assessment technology for composite material structure

Abstract

The invention discloses an impact monitoring and energy assessment technology for a composite material structure and belongs to the technical field of intelligent detection and assessment of the composite material structure. According to the technology, a new two-step impact positioning method including an energy distribution smooth filtering method and a TOF (time of flight) based four-side central positioning method is applied in the aspect of impact positioning; in the aspect of impact energy assessment, a multipath integrated energy distribution assessment method for imaging processing based on pixel grid optimization is proposed and assessment for the absorbed energy distribution condition of the structure is realized. With the adoption of the technology, whole-layout impact positioning and energy assessment are realized; by means of the new two-step impact positioning method, precision, timeliness and reliability of impact positioning are improved; influence of structural complexity and composite anisotropy on the impact positioning and impact energy assessment performance is inhibited, effective impact positioning and energy assessment in a severe external environment are also improved, and wide application of the technology in technical fields of intelligent detection and assessment of the composite material structure is promoted strongly.

Description

technical field [0001] The invention relates to an intelligent overall layout impact monitoring and energy assessment (IMEA) technology for composite material structures, belonging to the technical field of intelligent detection and evaluation of composite material structures. Background technique [0002] Composite materials with light weight, high specific strength and high specific stiffness (such as: carbon fiber reinforced composites, glass fiber reinforced composites, etc.) have been widely used in modern manufacturing (such as: aerospace manufacturing, automobile manufacturing, shipbuilding, etc. industry). Various key structural parts made of composite materials, as well as various large-scale and long-span load-bearing structures constructed of composite materials, are all because of the small weight of the engineering structures (parts) manufactured, and at the same time, they can ensure or increase their engineering capacity. The strength and rigidity of the stru...

AI Technical Summary

Problems solved by technology

However, the assessment calculation of most impact assessment methods needs to rely on the mechanical properties and parameters of the structure (or material). The inconsistency and inhomogeneity of the characteristics, the serious anisotropy of the material, and under the conditions, the approximation model will not be able to accurately evaluate the various indicators of the impact and impact, which will lead to a large evaluation error, and the evaluation result is very unsatisfactory

[0005] Therefore, based on the shortcomings of the existing technology and the needs of practical engineering applications, the present invention proposes the impact monitoring and evaluation IMEA technology based on the full layout of sensors. It is an intelligent real-time monitoring and evaluation management technology that can overcome the existing impact The monitoring and evaluation method can only localize the technical shortcomings, and perform online real-time impact positioning and impact energy evaluation from the full-span layout of the structure

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