Typical flight action-based aircraft severe load spectrum compilation method

Abstract

The invention relates to the field of aircraft fatigue, in particular to a typical flight action-based aircraft severe load spectrum compilation method. The severe load spectrum compilation method comprises the steps of determining an aircraft usage mission profile containing a typical flight action according to a predetermined condition; through numerical simulation analysis, expressing the typical flight action as a time function of a predetermined flight parameter; performing equivalent damage calculation on typical flight action data subjected to the numerical simulation analysis; analyzing an equivalent damage distribution law of the typical flight action subjected to the equivalent damage calculation; and compiling a severe load spectrum according to the equivalent damage distribution law of the typical flight action. According to the typical flight action-based aircraft severe load spectrum compilation method, a concept of the severe spectrum is applied to a representative flight method, so that the reliability of the load spectrum can be remarkably improved, the design analysis and test verification cycle can be shortened, and the research and development expenditures can be reduced.

Description

technical field [0001] The invention relates to the field of aircraft fatigue, in particular to an aircraft severe load spectrum preparation method based on typical flight actions. Background technique [0002] Since the 1990s, in order to shorten the test development cycle and ensure that most aircraft meet the design service life requirements, Western countries have devoted themselves to the study of severe load spectrum. In 2008, my country also clearly put forward the requirement of compiling the durability design severity spectrum in the new version of the national military standard GJB67.6A, so that 90% of the aircraft in the fleet are expected to meet the design service life. [0003] At present, in the process of preparing the load spectrum of high maneuvering aircraft, the representative landing method or the representative landing method based on typical flight actions are mostly used. This method uses the concept of life from the beginning of spectrum compilation...

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Problems solved by technology

However, the reliability of the load spectrum obtained by the above method is still not high enough

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