Method for compiling aeroengine comprehensive mission spectrum related to use

Abstract

The invention discloses a method for a compiling aeroengine comprehensive mission spectrum related to use. The method includes the following concrete steps: firstly, splicing and pre-processing maneuvering flight actually measured load spectrums of all sections of an engine; secondly, providing a concept of typical mission segments for the spliced maneuvering flight load spectrum, and dividing themaneuvering flight load spectrum into five types of the typical mission segments according to division principles; thirdly, establishing mathematical models and description methods for the typical mission segments; and finally, quantitatively compiling the aeroengine comprehensive mission spectrum by taking the typical mission segments as compiling units considering the principle that the comprehensive mission spectrum is consistent with low cycle fatigue damage, creep damage and thermal shock damage caused by the actually measured spectrums. According to the method, the comprehensive missionspectrum is compiled by taking the typical mission segments as the compiling units, and so the quantification of the compilation process is achieved. The method is simple, feasible and suitable, andprovides a basis for the strength analysis, life study and compilation of an accelerated mission test spectrum for the aeroengine.

Description

technical field [0001] The invention relates to the technical field of aero-engine load spectrum compilation, in particular to a method for compiling an aero-engine comprehensive task spectrum related to use, which provides a basis for aero-engine strength analysis, life research and acceleration task test run spectrum compilation. Background technique [0002] The load spectrum of an aeroengine refers to the curve of each flight parameter changing with time during a flight, that is, the "load-time" history curve, which is generally used for flight altitude, flight Mach number, engine speed, gas temperature after the turbine or engine throttle position Parameters such as power state cycle and use time ratio represent the proportion and size of the aerodynamic, thermal and mechanical loads that the aeroengine bears. The load spectrum of aeroengine runs through the whole process of engine design, test and life determination. The study of load spectrum is very important to impr...

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Problems solved by technology

[0007] The purpose of the invention is to propose a method for compiling a comprehensive task spectrum of an aero-engine related to use, to realize the quantification and standardization of the load spectrum compiling process, to solve the problem that the randomness of the load spectrum is relatively large, and to provide strength analysis for the engine, life studies and the compilation of accelerated mission test spectrums provide the basis for

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