... received August 16, 2018; published online October 16, 2018. Editor: Jerzy T. Sawicki. 27 06 2018 16 08 2018 gas foil bearing active gas bearing piezoelectric actuator vibration control rotordynamic instability The use of gas foil bearings (GFBs) has been widespread...

... 14 12 2011 bubbles elasticity flow instability hydrocarbon reservoirs laminar flow pumps rotors seals (stoppers) two-phase flow vibration control viscosity Annular (damper) seals restrict secondary leakage between stages in centrifugal pumps and compressors. The working...

... vibration control Experimental investigation of the dynamic response of structures such as bladed disks in gas and steam turbines is still of great importance. The exciting force pattern on the bladed disks is due to the gas (or steam) flowing through the vanes and to the rotor speed of the shaft...

... user-defined performance criteria. 14 04 2010 27 04 2010 28 10 2010 28 10 2010 adaptive control machine bearings machine control magnetic bearings transient analysis turbomachinery vibration control Active magnetic bearings (AMBs) offer many advantages over...

...M. Necip Sahinkaya; Abdul-Hadi G. Abulrub; Clifford R. Burrows; Patrick S. Keogh The paper considers three issues in flexible rotor and magnetic bearing systems, namely, the control of rotor vibration, control of transmitted forces, and prevention of rotor contact with auxiliary bearings...

...Andrea Tonoli; Nicola Amati; Angelo Bonfitto; Mario Silvagni; Bernard Staples; Evgueni Karpenko The vibration control of rotors for gas or steam turbines is usually performed using passive dampers when hydrodynamic bearings are not used. In layouts where the rotating parts are supported by rolling...

... forced response as compared with the tuned system. These findings were obtained on both single-degree-of-freedom per blade-disk models and a reduced order model of a blisk. blades damping discs (structures) reduced order systems shock absorbers turbomachinery vibration control blade...

... 2010 angular velocity control electric motors minimisation phase modulation resonance vibration control vibrations The system that is shown in Fig. 1 will be considered as the first one. This figure corresponds to the “half” model of the over-resonance vibratory machine, e.g...

... analysis vibration control Aero-engine assemblies typically have at least two nested rotors mounted within a flexible casing via squeeze-film damper (SFD) bearings. In leading European designs most of the SFDs are unsupported, as can be seen in Fig. 1 , where a parallel retainer spring (“squirrel...

... flow density finite volume methods fracture machine bearings machine control rotors stratified flow turbomachinery vibration control viscosity 28 03 2008 06 05 2008 29 09 2009 Tangential and radial forces per unit length ( z = 16.7   mm ) versus...

... , Mechanical and Structural Vibrations , Wiley , New York , pp. 135 – 139 . 02 04 2008 04 04 2008 13 04 2009 machinery nonlinear systems seals (stoppers) vibration control Squeeze film dampers (SFDs) aid to reduce synchronous vibration amplitude and enhance stability...

..., “A Gas Film Lubrication Study Part II: Numerical Solution of the Reynolds Equation of Finite Slider Bearings,” IBM Syst. J., pp. 256–259. 30 03 2008 07 04 2008 22 12 2008 compressible flow gas turbines hydrodynamics hydrostatics machine bearings rotors vibration control...

... Coefficients in a Squeeze Film Damper With a Mechanical Seal ,” Texas A&M University , TRC Report No. TRC-SFD-1-06. 10 05 2007 06 06 2007 29 04 2008 aircraft flow control friction lubricants mechanical testing orifices (mechanical) seals (stoppers) vibration control...

... to Blade Vibration Control ,” Proceeding of Design Engineering Technology Conferences , ASME Paper No. De-Vol. 84-2, Vol. 3 Pt. B, pp. 1377 – 1382 . Yang , B. D...

... for a prescribed transient exponential decay at a rotational speed of 11 Hz 05 07 2006 14 07 2006 rotors machine control vibration control magnetic bearings wavelet transforms transient response control system synthesis signal reconstruction machine bearings Rotor...

... 6 7 ). 02 08 2004 03 11 2005 turbomachinery blades wear superalloys fatigue cracks crack-edge stress field analysis hydrogen crystal growth crystal orientation finite element analysis transients vibration control Single-crystal nickel-base superalloy turbine...

.... 22 November 2002 20 November 2003 24 11 2004 rotors damping cavitation vibration control machine bearings aerospace engines Squeeze film dampers (SFD’s) are nonlinear elements used in aero-engine assemblies primarily to attenuate vibrations and transmitted forces...

... . Nicoletti, R., and Santos, I. F., 2001, “Vibration Control of Rotating Machinery Using Active Tilting-Pad Bearings,” Proceedings of the IEEE/ASME International Conference on Advanced Intelligent Mechatronics , Como, Italy, July 8–11, pp. 589–594. Santos, I. F., Scalabrin A., and Nicoletti, R., 2001...

... 2004 magnetic bearings vibration control rotors controllers bushings synchronous machines machine bearings It is common practice in rotor/magnetic bearing systems to incorporate auxiliary bearings that prevent damage to the rotor and stator laminations. In many applications...

... Load ,” J. Sound Vib. 0022-460X 10.1006/jsvi.1997.1305 , 210 ( 4 ), pp. 461 – 481 . Menq , C. H. , Chidamparam , P. , and Griffin , J. H. , 1991 , “ Friction Damping of Two-dimensional Motion and Its Application in Vibration Control ,” J. Sound Vib. 0022-460X 10.1016/0022...