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Keywords: machine bearings
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Journal Articles
Article Type: Research Papers
J. Vib. Acoust. April 2012, 134(2): 021018.
Published Online: January 26, 2012
... in the stability boundary below 45 Hz, but above this frequency the stability boundary is little different. 05 07 2010 16 08 2011 26 01 2012 26 01 2012 elastic constants force feedback force measurement Lyapunov methods machine bearings magnetic bearings nonlinear acoustics...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. December 2011, 133(6): 061012.
Published Online: November 28, 2011
... influences the dynamic behavior of the machine. The rotor motions’ coupling due to combi-bearing changes the system’s natural frequencies and vibration modes. 27 03 2011 13 07 2011 14 07 2011 28 11 2011 28 11 2011 angular velocity elastic constants hydrodynamics machine...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. December 2011, 133(6): 061006.
Published Online: October 12, 2011
... equilibriums. 28 01 2010 11 03 2011 12 10 2011 machine bearings rotors structural acoustics temperature distribution vibrations rotor bearing Morton Effect instability mid-span Using an assumption of isotropic linear bearings, the mechanism of the Morton Effect...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. December 2011, 133(6): 061004.
Published Online: October 4, 2011
... 11 03 2011 04 10 2011 04 10 2011 damping machine bearings rotors structural acoustics thermal stability vibrations In Secs. 2 3 , the rotor models where the thermal imbalance is assumed to coincide with the response displacement direction have been analyzed...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. April 2011, 133(2): 021004.
Published Online: March 1, 2011
.... By converse, for higher frequencies, the force becomes of the elastic type. This can be exploited to achieve levitation. eddy current induction bearing rotordynamics stability electromechanical interaction damping eddy currents electrodynamics machine bearings structural acoustics...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. April 2011, 133(2): 021005.
Published Online: March 1, 2011
... of the proposed method and it is also validated experimentally. 21 08 2009 16 04 2010 01 03 2011 01 03 2011 abrasion elastic constants impact (mechanical) lubrication machine bearings mechanical contact mechanical guides nonlinear estimation rotors stators vibration control...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2010, 132(5): 051009.
Published Online: August 26, 2010
.... damping eigenvalues and eigenfunctions elastic constants frequency response machine bearings modal analysis reduced order systems shafts state-space methods structural acoustics thermal analysis vibrations Tilting-pad journal bearings (TPJBs) are widely used to provide lateral support...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2010, 132(5): 051008.
Published Online: August 20, 2010
... 2010 machine bearings rotors shafts structural acoustics vibrations It has been known for many years that thermal temperature gradients across a rotor can alter the amplitude and phase of synchronous vibration. This is due to bowing of the shaft caused by a temperature difference...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. August 2010, 132(4): 041012.
Published Online: July 15, 2010
... address the sophisticated vibration isolation requirements particular to the VDE systems. 11 04 2009 23 03 2010 15 07 2010 15 07 2010 automotive components bushings electromagnetic actuators engines hydraulic control equipment machine bearings solenoids vibration...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. June 2010, 132(3): 031009.
Published Online: April 28, 2010
... emission testing active noise control machine bearings statistics acoustic emission condition monitoring denoising DWT SANC spectral subtraction rolling bearing Acoustic emission (AE) results from the release of energy in the form of transient elastic waves in the material ( 1...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. June 2010, 132(3): 031005.
Published Online: April 22, 2010
... distributions and thus identify the type of looseness fault at machinery. 04 03 2009 22 06 2009 22 04 2010 22 04 2010 electric machines fault diagnosis Hilbert transforms machine bearings rotors vibrations HHT EEMD looseness fault diagnosis vibration analysis marginal...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2009, 131(5): 051008.
Published Online: September 11, 2009
... of brackets mounted on an air-bearing spindle and a fluid-dynamic bearing spindle at various spin speeds. Measured Campbell diagrams agree well with the theoretical predictions. 20 01 2009 27 03 2009 11 09 2009 machine bearings rotors vibrations Rotary machines appear in many...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2009, 131(5): 051006.
Published Online: September 10, 2009
.... 10a . e is the eccentricity of the journal. The load diagram of the lower SFD is shown in Fig. 10b ( 19 ). 14 08 2008 27 02 2009 10 09 2009 flywheels machine bearings magnetic bearings vibration control flywheel energy storage system hybrid bearing rotor...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. August 2009, 131(4): 041012.
Published Online: June 18, 2009
... feature extraction Fourier transforms machine bearings vibration measurement wavelet transforms signature extraction wavelet transform bearing diagnosis Rolling element bearings enable low-friction rotational motion in a variety of machine systems, from bicycles to electrical power...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. April 2009, 131(2): 021007.
Published Online: February 18, 2009
... primary and secondary frequency branches from the waterfall plots agree well with those predicted analytically. 22 10 2007 29 06 2008 18 02 2009 discs (structures) Doppler measurement Fourier analysis gyroscopes machine bearings measurement by laser beam rotors softening...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. April 2009, 131(2): 021009.
Published Online: February 18, 2009
... the experimental and analytical results even though the experimental data show some small fluctuation at the noise level. 12 11 2007 01 07 2008 18 02 2009 bending fasteners machine bearings shear strength torque vibrations vibration loosening self-loosening threaded fasteners...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. December 2008, 130(6): 061007.
Published Online: October 15, 2008
... in ensuring a stable operating range to the rotor is studied by means of root loci. Comparison with literature results is finally used to validate the model. 07 02 2008 12 07 2008 15 10 2008 damping electromagnetic induction machine bearings magnetic bearings rotors stability...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. June 2008, 130(3): 031003.
Published Online: April 3, 2008
... accurate and reliable. 28 11 2006 17 10 2007 03 04 2008 compressors finite difference methods finite element analysis lubrication machine bearings nonlinear systems rotors rotor system sliding bearing rotating elastic medium finite element simulation lubrication layer...
Journal Articles
Article Type: Technical Briefs
J. Vib. Acoust. April 2008, 130(2): 024502.
Published Online: January 30, 2008
... monitoring electrohydrodynamics fault diagnosis lubrication machine bearings machine testing acoustic emission bearing monitoring elastohydrodynamic lubrication The application of acoustic emission (AE) for bearing diagnosis is gaining ground as a complementary diagnostic tool; however...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. August 2007, 129(4): 484–494.
Published Online: April 15, 2007
... friction machine bearings fasteners vibrations clamps lubricating oils coatings self-loosening vibration loosening thread friction bearing friction fastener coating and lubrication Increasing the bearing friction coefficient increases the bearing frictional resistance and reduces...