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The Modal Characteristic Study of Varational Turbine Blades by Means of Advanced CAD Techniques and FEM

The solid models of axial back swept turbines are established by means of advanced CAD techniques and the finite element method is used in studying their modal characteristics.Modeling methods of turbine blades with different cross sections are presented.How the shape of their cross sections and the axial slant cutting at the exit side influence the modal characteristic of turbine blades is analyzed on condition that the other parameters are identical.The test values show that the methods used in this paper are suitable for systematic research of the modal characteristic of turbine blades and the calculating results in this paper are of reference meaning for designing similar turbines.SDRC's I DEAS TM software system is used in this paper.