Modal analysis of drive axle based on OMA time domain method identification

Time domain modal analysis method is one of the most important modal analysis methods nowadays, which doesn´t need to transform the systematic input and output signal from the time domain to frequency domain, thus it can avoid fast Fourier transformation´s leakage error, reducing the required equipments and cost. This paper adopts Output-only Modal Analysis to identify the modal parameters of the X drive axle, which can obtain the related modal parameters and compare time domain´s modal analysis results with the finite element calculation´s. It also proves that OMA method is reliable in the modal analysis. The date also provide some helpful method for drive axle structure optimization.