Abstract
The purpose of this study is to predict the critical speed of an axial fan using finite element analysis. The critical speed has an important meaning in evaluating the stability against the occurrence of overload of the ventilation system in an emergency situation of the axial fan. Through finite element analysis, the maximum stress acting on the axial fan was derived, and the results were derived for permanent deformation and fracture of the material by dividing it into an elastic region and a plastic region. The critical speed of the axial fan through the overspeed test and the analysis results of the finite element analysis were compared.
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