Fatigue test loading spectrum forming method and device and fatigue performance testing method

Abstract

The invention relates to a fatigue test loading spectrum forming method and device and a fatigue performance testing method, belongs to the technical field of aircraft environment engineering, and aims to solve the problems that an existing load loading control system cannot directly recognize a structural fatigue load spectrum and cannot apply a load. The fatigue test loading spectrum forming method comprises the following steps of: determining the direction of load applied to each loading section of a to-be-tested structural member and a load value corresponding to the load direction to form a load condition table; according to the load condition table and the change time of the load, generating a plurality of step instructions according to a load change sequence; and according to the structure of a flight-continuation-flight fatigue load spectrum and different load working conditions, enabling the multiple step instructions to form load sequence block spectra corresponding to the load working conditions. With the fatigue test loading spectrum forming method and device and the fatigue performance testing method of the invention adopted, a structure fatigue load spectrum can be converted into a fatigue test loading spectrum identified by a loading control system, and the test efficiency is improved on the basis of ensuring the test accuracy and effectiveness.

Description

technical field [0001] The invention relates to the technical field of aircraft environment engineering, in particular to a method and device for forming a fatigue test loading spectrum and a fatigue performance test method. Background technique [0002] Structural fatigue load spectrum is an important condition and basis for fatigue performance assessment of structural parts. The application of fatigue load in the structural fatigue performance assessment test is realized through the load loading control system, but the load loading control system cannot directly identify the structural fatigue load spectrum and cannot perform load application. It is necessary to convert from the fatigue load spectrum (the fatigue load spectrum is the load or stress whose size and direction change periodically or irregularly with time) to the fatigue test loading spectrum, and convert it into a fatigue test loading spectrum that can be recognized by the loading control system. In this way,...

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Problems solved by technology

[0003] In view of the above analysis, the embodiment of the present invention aims to provide a method and device for forming a fatigue test loading spectrum and a fatigue performance testing method to solve the problem that the existing load loading control system cannot directly identify the structural fatigue load spectrum and cannot perform load application. question

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