Search results for "Rotor-dynamics"

showing 2 items of 2 documents

Nonlinear analysis of cylindrical and conical hysteretic whirl motions in rotor-dynamics

2014

Abstract The internal friction of a rotor–shaft-support system is mainly due to the shaft structural hysteresis and to some possible shrink-fit release of the assembly. The experimentation points out the destabilizing effect of the internal friction in the over-critical rotor running. Nevertheless, this detrimental influence may be efficiently counterbalanced by other external dissipative sources located in the supports or by a proper anisotropic configuration of the support stiffness. The present analysis considers a rotor–shaft system which is symmetric with respect to the mid-span and is constrained by viscous-flexible supports with different stiffness on two orthogonal planes. The cylin…

EngineeringAcoustics and Ultrasonicsbusiness.industryRotor (electric)Mechanical EngineeringRotation around a fixed axisStiffnessConical surfaceDissipationCondensed Matter PhysicsSettore ING-IND/13 - Meccanica Applicata Alle Macchinelaw.inventionNonlinear systemHysteresisClassical mechanicsMechanics of MaterialslawDissipative systemmedicineRotor-dynamics cylindrical and conical whirl nonlinear rotor-shaft hysteresis perturbation approach.medicine.symptombusinessJournal of Sound and Vibration
researchProduct

Stability analysis of rotor whirl under nonlinear internal friction by a general averaging approach

2016

The two main sources of internal friction in a rotor-shaft system are the shaft structural hysteresis and the possible shrink-fit release of the assembly. The internal friction tends to destabilize the over-critical rotor running, but a remedy against this effect may be provided by a proper combination of some external damping in the supports and an anisotropic arrangement of the support stiffness, or at most by the support damping alone, depending on the system geometry. The present analysis reported here considers a general asymmetric rotor-shaft system, where the rotor is perfectly rigid and is constrained by viscous–flexible supports having different stiffnesses on two orthogonal plane…

Engineeringbusiness.industryRotor (electric)Mechanical EngineeringAerospace Engineering02 engineering and technologySettore ING-IND/13 - Meccanica Applicata Alle Macchine01 natural sciencesStability (probability)Internal frictionAveraging approach nonlinear rotor-shaft hysteresis overcritical whirl rotor-dynamicslaw.inventionNonlinear systemHysteresis020303 mechanical engineering & transports0203 mechanical engineeringMechanics of MaterialsControl theorylaw0103 physical sciencesAutomotive EngineeringGeneral Materials Sciencebusiness010301 acousticsJournal of Vibration and Control
researchProduct