Diagnosis method of structural damage monitoring and accumulation degree

Abstract

The invention discloses a method for diagnosing damage monitoring and accumulation degree of a structural part, belonging to the technical field of damage detection, comprising the following steps: measuring the electrical impedance of the structural part, and extracting characteristic parameters of the electrical impedance; Establish a damage area probability diagnosis model of the structural component; establish a damage cumulative degree probability diagnosis model according to the characteristic parameters; determine the cumulative damage of the structural component through the structural damage area probability diagnosis model and the damage accumulation degree probability diagnosis model . The present invention can perform non-destructive damage monitoring on complex structural parts, and can also diagnose the accumulative degree of damage of structural parts, and is not affected by the structure and material of the structural parts themselves.

Description

technical field [0001] The invention relates to a method for diagnosing damage monitoring and accumulation degree of structural parts, belonging to the technical field of damage detection. Background technique [0002] With the development of aerospace, machinery manufacturing, construction and other fields, complex structures such as metal-non-metal connectors are widely used in all walks of life. As a typical metal and non-metal composite structure helicopter engine air intake purifier device, it is exposed to a dusty and misty environment for a long time, and the high-speed running dust-laden air enters the engine and produces high-speed impact, resulting in damage to the engine intake air purifier. , which seriously affects the service life of helicopters and causes safety accidents. Therefore, the detection of structural defects in complex structures has become a crucial task. [0003] At present, non-destructive testing methods commonly used for complex structures inc...

AI Technical Summary

Problems solved by technology

However, the existing non-destructive testing methods are usually limited by the complexity of the structural parts and the materials of the structural parts themselves, so the scope of application is limited.

For example, infrared detection technology judges the damage of structural parts according to the difference in temperature changes of the tested parts, so there are certain requirements for the thermal conductivity and thickness of the material, which will affect the detection sensitivity in complicated cases; CR / X rays are not sensitive to the air layer. Sensitive, long detection period, high cost, huge equipment, unsafe for human body, so it is not suitable for online real-time operation; laser detection method is affected by penetration, equipment stability, and real-time performance, and it is currently impossible to achieve on-site detection

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