Digital twin driven crack detection and diagnosis method of aero-engine turbine disk

Abstract

The invention discloses a digital twin driven crack detection and diagnosis method of an aero-engine turbine disk, comprising three parts: the establishment of a digital twin database of an aero-engine turbine disk-rotor-supporting system, the crack detection of the aero-engine turbine disk, and the crack quantitative diagnosis of the aero-engine turbine disk. In a flight process, the flight attitude, speed and altitude of an aircraft will constantly change and are affected by the airflow, the operating conditions of the aero-engine turbine disk, a rotating shaft and a main bearing change accordingly. According to the digital twin driven crack detection and diagnosis method disclosed by the invention, the digital twin technology is imported into the field of crack detection and quantitative diagnosis method of the aero-engine turbine disk, so that the instantaneity and accuracy of the crack detection and quantitative diagnosis result of the aero-engine turbine disk are improved; and anew idea can not only be provided for the research on the crack detection and quantitative diagnosis method of the aero-engine turbine disk, and a way can also be explored for the practical application of the digital twin technology.

Description

technical field [0001] The invention belongs to the field of mechanical fault diagnosis, and relates to a method for detecting and diagnosing cracks in an aero-engine turbine disk driven by a digital twin. Background technique [0002] Turbine disk is one of the key transmission components in aero-engines. It mainly carries the energy in the high-temperature and high-pressure gas ejected from the combustion chamber into mechanical energy, which plays a key role in ensuring the safe and efficient operation of aero-engines. With the development of the aviation industry, the performance indicators such as the thrust-to-weight ratio of aero-engines have been continuously improved, and higher requirements have been put forward for the design, manufacture, monitoring and diagnosis of aero-engine turbine disks. Cracks are one of the common failure forms of aero-engine turbine disks, and the occurrence of cracks will pose a huge threat to the work of the turbine disks. Therefore, t...

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Problems solved by technology

[0005] The purpose of the present invention is to propose a digital twin-driven aero-engine turbine disk crack detection and diagnosis method, to solve the shortcomings of existing methods that are less researched on the online detection technology of aero-engine turbine disk cracks and cannot consider changes in working conditions

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