.... , and Cen , S. Q. , 2009 , “ Theoretical and Experimental Study on Dynamic Coefficients and Stability for a Hydrostatic/Hydrodynamic Conical Bearing ,” ASME J. Tribol. , 131 ( 4 ), p. 41701 . 10.1115/1.3176991 [10] Khalil , M. F. , Kassab , S. Z. , and Ismail , A. S. , 1993...

...Changmin Chen; Jianping Jing; Jiqing Cong; Zezeng Dai; Jianhua Cheng The position of fluid film in journal bearing will change while the journal moving in bearing, which can be named fluid film boundary migration (FFBM). It is usually ignored in the calculation of linear dynamic coefficients. While...

.... 08 03 2018 12 06 2018 helically grooved seals axially partial helical grooves static and dynamic characteristics leakage flow rate dynamic fluid-film force dynamic coefficients whirl-frequency ratio effective damping coefficient Helically grooved seals have been proposed...

.... , 126 , pp. 125 – 131 . 10.1115/1.1631018 [10] Lund , J. W. , 1987 , “ Review of the Concept of Dynamic Coefficients for Fluid Film Journal Bearings ,” J. Tribol. , 109 , pp. 37 – 41 . 10.1115/1.3261324 [11] Nicoletti , R. , 1999 , “ Efeitos Térmicos em Mancais Segmentados...

... solving the unsteady compressible thin film fluid equations, we propose a method based on the use of frequency dependent dynamic coefficients and on the rational function approximation of the resulting impedances. Calculating impedances for several eccentricities enables mapping the full dynamic behavior...

... of the analytical method is that the complete set of dynamic coefficients of tilting-pad gas bearings can be obtained. The predictions show that the perturbation frequency has the strong effects on the dynamic coefficients of gas bearings. In general, at lower perturbation frequency, the equivalent direct stiffness...

...-acting tilting-pad gas bearing. The dynamic coefficients with the pads fixed and with the pads perturbation are, respectively, obtained for a typical self-acting tilting-pad gas bearing by using the proposed method to mainly explain the dependency of the bearing dynamic coefficients on the perturbation...

... for the direct and cross-coupling stiffness and for the cross-coupling damping. The results obtained for the direct damping are still under discussion. textured surface annular seal CFD analysis dynamic coefficients experimental test rig Annular seals are largely used in turbomachinery...

...Guang Qiao; Liping Wang; Tiesheng Zheng This paper describes a mathematical model to study the linear stability of a tilting-pad journal bearing system. By employing the Newton-Raphson method and the pad assembly technique, the full dynamic coefficients involving the shaft degrees of freedom...