Modal Research of a Certain Type of Gas Turbine Rotor

Abstract At present, one of the bottlenecks that currently restrict reliability and lifetime whole machine is rotor-bearing system gas turbines. This paper firstly introduces background turbines current research situation, then carries out 3D modelling using UG (Unigraphics NX) software according to available 2D drawings original rotor relevant parameters. In view complex structure technical problems in actual installation process, bearing-rotor was modified modelled as well, followed by modal analysis Campbell diagrams based on Ansys Workbench software. Finally, simulation results were compared with theoretical verify feasibility scheme provide support for subsequent 1:1 turbine performance test-bed comprehensive experimental study development bearings.