Load spectrum compilation method of aero-engine high-temperature component, medium, terminal and application

Abstract

The invention discloses a load spectrum compilation method, a medium, a terminal and application of an aero-engine high-temperature component, and relates to the technical field of aero-engine structural integrity. Performing thermal-mechanical multi-field coupling analysis on the evaluated high-temperature component by combining the use working condition and actually measured flight data, and determining a service life assessment area and typical state parameters of a load of the service life assessment area; establishing an equivalent conversion model of a fatigue-creep load and a fatigue load; in order to determine model parameters, the calculated state parameters are used as input conditions, a material test is carried out, and the service life cycle number and the damage index corresponding to each stress level and load holding time are determined; and identifying the duration of equivalent and small-amplitude circulation in a data compression process, and converting into fatigue circulation by using the established equivalent conversion model. According to the invention, a fatigue-creep load equivalent conversion model established based on material test and simulation analysis is introduced as a technical hub between a failure mechanism of a structure and a material and a cycle counting process.

Description

technical field [0001] The disclosure of the present invention relates to the technical field of structural integrity of aero-engines, and in particular to a load spectrum compilation method suitable for high-temperature parts of aero-engines, a computer-readable storage medium, and an information data processing terminal. Background technique [0002] The research on the structural integrity of aero-engines largely depends on the authenticity of the load spectrum. The load spectrum is obtained by properly compressing the load-time history of the actual flight data. The statistical processing of this random load history is currently mainly using the rainflow counting method . The rainflow counting method is a two-parameter counting method based on the relationship between material fatigue damage and stress and strain. Since its counting rule is consistent with the stress-strain hysteresis loop, time-independent key information (average amplitude cycle) can be easily extract...

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Problems solved by technology

[0006] Aiming at the problem that the existing load processing methods under high temperature conditions ignore or take insufficient consideration of the damage within the load-holding time, the present invention discloses a load spectrum preparation method suitable for high-temperature components of aero-engines, based on the extended fatigue-creep load equivalent Conversion theory, relying on material tests to give an equivalent conversion modeling method covering all working conditions (any load level, temperature, load time), considering that the load-time history is composed of a large number of small-amplitude cycles and equivalent points load protection, optimize load processing processes such as equivalent point compression, invalid amplitude, etc., and improve the life prediction accuracy of high-temperature components of aero-engines with extreme and complex service environments

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