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Keywords: stability
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Journal Articles
Article Type: Research Papers
J. Tribol. March 2021, 143(3): 031801.
Paper No: TRIB-19-1486
Published Online: September 1, 2020
... for publication in the J ournal of T ribology . 24 11 2019 31 07 2020 01 08 2020 01 09 2020 hybrid bearing floating ring mixed flow THD model stability hydrodynamic lubrication The hybrid floating ring bearing (FRB) has been widely used in many high-speed and super...
Journal Articles
Article Type: Research-Article
J. Tribol. October 2019, 141(10): 101701.
Paper No: TRIB-19-1033
Published Online: July 17, 2019
...Fangxu Sun; Xianbiao Zhang; Xing Wang; Zhenzhong Su; Dong Wang Effects of shaft shape errors are studied on dynamic characteristics of a rotor-bearing system. Stability characteristics of the cylindrical journal bearing are studied. It is shown that the rotating speed at which the oil whip occurs...
Journal Articles
Article Type: Research-Article
J. Tribol. October 2014, 136(4): 041704.
Paper No: TRIB-13-1218
Published Online: June 19, 2014
... coefficients are calculated and stability charts of Newtonian, MR, and NMR fluid are presented and discussed. journal bearings magnetorheological nanomagnetorheological fluids stiffness damping properties stability MR fluids are a category of fluids, the viscosity of which can be controlled...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2011, 133(2): 021703.
Published Online: March 22, 2011
... , S. P. , and Goodier , J. N. , 1970 , Theory of Elasticity , McGraw-Hill , New York , pp. 80 – 83 . 22 09 2010 13 01 2011 22 03 2011 22 03 2011 convection electric power generation fuel cells machine bearings rotors solar cells stability...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2010, 132(2): 022201.
Published Online: April 6, 2010
... to follow the structural motion, which is due to unsteady aerodynamic forces applied onto the structure by the fluid. Such an integrated time-domain approach allows the direct computation of aeroelastic time histories from which the aerodynamic damping, and hence, the flutter stability, can be determined...
Journal Articles
Article Type: Research Papers
J. Tribol. January 2010, 132(1): 011703.
Published Online: November 17, 2009
...Hiromu Hashimoto; Masayuki Ochiai This paper describes the stabilization method for small-bore circular journal bearings using starved lubrication. First, we describe the experimental examination to confirm the effect of supply oil conditions on stability of circular journal bearing by using a high...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2009, 131(4): 041701.
Published Online: September 21, 2009
... their characteristics under different operating conditions. Numerical results are compared with the experimental results. The stability parameters of hybrid conical, hydrodynamic, and hydrostatic bearings are compared. The results show that the hybrid conical bearing has the advantages of high load carrying capability...
Journal Articles
Article Type: Research Papers
J. Tribol. January 2009, 131(1): 011705.
Published Online: December 4, 2008
...Hiromu Hashimoto; Masayuki Ochiai Journal bearings are widely used for supporting high-speed rotating machinery, such as turbine, compressor, and HDD spindle, because of their high load carrying capacity, stability, and durability. Recently, the engineering trend is oriented to higher speed...
Journal Articles
Article Type: Technical Papers
J. Tribol. July 2007, 129(3): 628–639.
Published Online: March 2, 2007
... limit cycles. The observation is believed to be true with any air foil bearings with different types of elastic foundations. Despite the many theoretical and experimental research works for decades, the role of underlying elastic foundation and damping on the rotor-bearing stability is not well...
Journal Articles
Article Type: Technical Papers
J. Tribol. April 2007, 129(2): 354–364.
Published Online: November 15, 2006
...Daejong Kim Experimental and analytical studies on air foil bearings have been performed extensively over the past decades, and significant improvement in load capacity and rotor dynamics stability have been reported. Often, advanced air foil bearings are believed to have complicated bump foil...
Journal Articles
Article Type: Technical Papers
J. Tribol. January 2007, 129(1): 106–111.
Published Online: August 14, 2006
... bearings is optimized in a sense of enhancing the stability of the full circular bearing at high rotational speeds. A performance index is chosen as the sum of the squared whirl-frequency ratios over a wide range of eccentricity ratios, and a Fourier series is used to represent an arbitrary clearance...
Journal Articles
Article Type: Technical Papers
J. Tribol. January 2007, 129(1): 112–119.
Published Online: July 27, 2006
... design with suggested optimum design variables could be also stable under relatively large destabilizing forces. 31 05 2005 27 07 2006 design engineering machine bearings turbomachinery micromechanical devices finite element analysis rotors mechanical stability tilting pad...
Journal Articles
Article Type: Technical Papers
J. Tribol. January 2005, 127(1): 112–119.
Published Online: February 7, 2005
... a numerical procedure for stability analysis of a liquid lubricated rough journal bearing. The Elrod generalized theory of Reynolds roughness provides a governing equation based on the surface configuration. The Elrod cavitation algorithm conserves mass throughout the bearing and automatically predicts...
Journal Articles
Article Type: Technical Papers
J. Tribol. April 2004, 126(2): 281–287.
Published Online: April 19, 2004
...T. V. V. L. N. Rao, Assistant Professor; Jerzy T. Sawicki, Fellow ASME Stability characteristics of the herringbone grooved journal bearings (HGJBs) are analyzed taking into account cavitation of the fluid flow. The perturbed values of pressure and film thickness from a given equilibrium position...
Journal Articles
Article Type: Technical Papers
J. Tribol. April 2003, 125(2): 403–413.
Published Online: March 19, 2003
... of the mechanical face seal. Closed-form solutions are presented for the transient natural response to initial velocity conditions, the steady-state response to rotor runout and initial stator misalignment, the transmissibility ratios, and the stability threshold. Results from the closed-form solutions are all...
Journal Articles
Article Type: Technical Papers
J. Tribol. July 2002, 124(3): 524–529.
Published Online: May 31, 2002
... shear deformation rotors damping seals (stoppers) friction stators gas turbines stability Turbomachinery annular seals are provided to limit leakage between regions at different pressures. Seals increase the efficiency of turbomachines; however, they can also significantly influence...
Journal Articles
Article Type: Technical Papers
J. Tribol. July 2002, 124(3): 607–616.
Published Online: May 31, 2002
... techniques was relatively scarce. Indeed, most existing theoretical studies either deal with the structural behavior, or use simplified flow modeling. The aeroelasticity stability of a simplified air-riding seal geometry, devised for this particular feasibility study, was analyzed in three dimensions...
Journal Articles
Article Type: Technical Papers
J. Tribol. April 2002, 124(2): 398–405.
Published Online: February 1, 2001
...S. Yoshimoto, Professor; S. Oshima, Graduate Student; S. Danbara, Research Associate; T. Shitara In this paper, the stability of water-lubricated, hydrostatic, conical bearings with spiral grooves for high-speed spindles is investigated theoretically and experimentally. In these bearing types...
Journal Articles
Article Type: Technical Notes
J. Tribol. July 2001, 123(3): 651–654.
Published Online: July 6, 2000
...K. Raghunandana; B. C. Majumdar, and; R. Maiti The purpose of this paper is to study the effect of non-Newtonian lubricant on the stability of oil film journal bearings mounted on flexible support using linear perturbation technique. The model of non-Newtonian lubricant developed by Dien and Elrod...
Journal Articles
Article Type: Technical Papers
J. Tribol. October 2000, 122(4): 849–855.
Published Online: December 29, 1999
...Kwangjin Lee Thermoelastic instability in automotive drum brake systems is investigated using a finite layer model with one-sided frictional heating. With realistic material properties of automotive brakes, the stability behavior of the one-sided heating mode is similar to that of the antisymmetric...