7. RotorDynamics and Active Detection of Faults in Rotating Bodies

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Structural Dynamics Toolbox• Structural Dynamics Toolbox offers :– 3D Finite Element Modeling– Experimental Modal Analysis– Test / Analysis correlation– Modular approach• MATLAB environmentCADMeshingFEMSimulation• OpenFEM : Core FE software Tests• FEMLink : Import / export industrial modulesRuntime SDTSDT, Visco, Rotor, …OpenFEM FEMlinkMATLAB• Custom extensions (Rotor, Visco, Runtime)• SDT Rotor extends capabilities in rotordynamics– 1 D beam/mass (critical speed, Campbell, forced response)– 3 D cyclic symmetry and full rotor super-element– Time domain (rotor/stator interaction)NASTRANPERMASSAMCEFANSYSUFF / IDEASABAQUSAdamsSimulinkIDEAS TestExcel
SDT Rotor1 D beam/mass (critical speed, Campbell,forced response)3 D models– Cyclic symmetry (mono and multi-stage)– Sector super-element (mono and multi-stage),mistuning, rogue blade, sector model, full andpartial restitution, test/analysis correlation, …– Campbell diagram (body fixed model)– Inertial, thermal and pressure loads,temperature dependent materialsTime domain (rotor/stator interaction)– Shaft superelement in body fixed framee y NL– Non-linear bearing models (currently only NLstiffness and damping)simulation resultreally hard to understandCurrently beta, stable release 2009Images A. Sternchuss, funded by SNECMALocalization due to mistuning, full shaft mode/diameter analysis,Campbell diagram for mistuned disk, time simulation of an engine withgyroscopic effects (funded PSA)
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Rotor Dynamics andActive Detection
Page 9 and 10: Disk dynamicsDifferences & similari
Page 11 and 12: RotationStationary excitation & res
Page 14 and 15: Transient signal&signal processingI
Page 16 and 17: Forward & backward whirlseparationI
Page 18 and 19: Time-frequency• SpectrogramI. Buc
Page 20 and 21: Campbell diagram - measuredfrequenc
Page 22: Complete test-rigI. Bucher
Page 29 and 30: Test Rig - OverviewLaserMeasurement
Page 31 and 32: Using laserDisksMeasurement systemI
Page 33 and 34: 21Actuator &sensorActuator &sensorI
Page 35 and 36: Whirl in presence of a crack0 O0 Of
Page 37 and 38: First forward critical speed :62.9
Page 39 and 40: Kirson Y. Problems relating to bala
Page 41 and 42: Shaft anisotropyDeviatory stiffness
Page 43 and 44: sensorHarmonic balance & Taylor exp
Page 45 and 46: 53I. Bucher
Page 47 and 48: asymmetric rotor with and without a
Page 49 and 50: frequencyspeed59I. Bucher
Page 51 and 52: I. Bucher
Page 53 and 54: Thank youI. Bucher
Page 55 and 56: Angular unbalanceAsymmetric discDoF
Page 57 and 58: Perfectly balancedSymmetric disce3A
Page 59: Classical Rotor Dynamics Modelling3
Page 63 and 64: Inertial C.S.General formSeries Sol
Page 65 and 66: Engine order domain+forwardtime (sp
Page 67 and 68: 26I. Bucher
Page 69 and 70: I. Bucher
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7. RotorDynamics and Active Detection of Faults in Rotating Bodies

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