Simulation test piece design method for fatigue test of lifting lug of electric cabinet of bullet train

The invention discloses a simulation test piece design method for a fatigue test of a lifting lug of an electrical cabinet of a bullet train, and the method comprises the steps: S1, carrying out the test analysis of a load spectrum in an actual service process of the electrical cabinet, obtaining a load road spectrum under a typical working condition, and determining a change curve of a load along with the time; s2, performing simulation analysis by taking the three-dimensional model of the electrical cabinet as a carrier, and obtaining a key section and a simulation value of the lifting lug under the action of an actual load spectrum and a standard load spectrum; and S3, designing an equivalent simulation test piece for a laboratory acceleration test on the basis of an equivalence principle by combining the geometrical shape parameters of the lifting lug and the stress gradient of the key section. The method has the advantages of being simple in principle, high in reliability and precision and the like, key