Taking the traction motor of a certain type of high-speed EMU as the research object,the time-domain ac-celeration load of the traction motor in all directions were obtained through line testing.The acceleration power spec-tral density was obtained by Fourier transform,and the acceleration power spectral density was input into the vibra-tion test bench,and is simulated to obtain the time-domain acceleration load of the vibration test bench.A compara-tive analysis was conducted on the difference between the measured time-domain acceleration load through line test-ing and the acceleration time-domain load input to the vibration test bench.The rain flow counting method was used to cyclically count the time-domain load and compile the acceleration load amplitude spectrum.The relative fatigue damage ratios of two time-domain loads is defined,and finally the acceleration test spectrum is corrected and ob-tained based on the fatigue damage consistency theory.The research results can provide a certain theoretical refer-ence for the optimization design and life assessment of the traction motor of high-speed EMU,as well as theoretical support for the formulation of relevant product testing standards.
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