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Signal symmetry-based impact damage identification method for isotropic flat plate structure

An isotropic and identification method technology, applied in the testing of machine/structural components, impact testing, strength characteristics, etc., can solve the problem that impact monitoring cannot identify impact position and identify damage at the same time, so as to promote application and development and simplify hardware The effect of low requirements, software and hardware requirements

Active Publication Date: 2021-10-22
HENAN UNIV OF SCI & TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide an impact damage identification method based on signal symmetry and isotropic flat plate structure. This method can effectively solve the problem that the impact position and damage cannot be identified at the same time in impact monitoring, and can quickly impact the monitoring area. Identification and monitoring of location and impact damage

Method used

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  • Signal symmetry-based impact damage identification method for isotropic flat plate structure
  • Signal symmetry-based impact damage identification method for isotropic flat plate structure
  • Signal symmetry-based impact damage identification method for isotropic flat plate structure

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the drawings and embodiments, but it is not used as a basis for any limitation on the invention.

[0030] The impact damage identification method of isotropic flat plate structure based on signal symmetry according to the present invention figure 1 The process shown is carried out, and the detailed steps are as follows:

[0031] Step 1: Two sets of sensor arrays are arranged on the isotropic flat plate structure, one set of sensor arrays is arranged on the upper surface of the flat plate, and the other set of sensor arrays is arranged on the lower surface of the flat plate, and the upper and lower sensors correspond one by one; the two sets of sensor arrays Each sensor in the system is connected to the data acquisition system of the monitoring center, and the monitoring center collects the sensor signal of each sensor synchronously;

[0032] Step 2, using the distribution of sensors to ...

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Abstract

The invention relates to a signal symmetry-based impact damage identification method for an isotropic flat plate structure, and the method comprises the steps: estimating an impact position through the wave arrival time and signal energy of each sensor signal in a monitoring region, and identifying impact damage through the symmetry of the sensor signals on the upper and lower surfaces of the flat plate structure. According to the invention, the problem that the impact position and the damage cannot be identified at the same time in impact monitoring can be effectively solved, so that the hardware requirement of the system is simplified, the signal processing process is simplified, and the online requirement of real-time monitoring of structural health monitoring can be met.

Description

technical field [0001] The invention belongs to the technical field of structural health monitoring, and in particular relates to an impact damage identification method of an isotropic flat plate structure. Background technique [0002] Aluminum alloy is one of the main metal materials in aeronautical structures. It is an isotropic material and is widely used in skins, frames, brackets, and other aeronautical structures. In the process of production, transportation, use and maintenance, aeronautical structures will inevitably suffer from external shocks, which will lead to a decrease in the strength and stability of the structure, and even cause sudden damage to the entire structure. How to quickly estimate the impact location and determine the potential damage location is an important task to ensure the safety of aerostructures. [0003] The common impact location method generally only identifies the impact location, but does not evaluate whether the structure is damaged, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/00G01N3/06G01M7/08
CPCG01B21/00G01N3/06G01M7/08G01N2203/0282G01N2203/0682Y02T90/00
Inventor 许龙涛韩彦伟辛士红杜翠王文胜彭础琦张乾贾元青邓微微王玲茹
Owner HENAN UNIV OF SCI & TECH
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