Discussion: “The Elastohydrodynamic Solution of Journal Bearings Under Dynamic Loading” (Oh, K. P., and Goenka, P. K., 1985, ASME J. Tribol., 107, pp. 389–394)

1985 ◽  
Vol 107 (3) ◽  
pp. 395-395 ◽  
Author(s):  
J. F. Booker
Keyword(s):  
Dynamic Loading ◽  
Journal Bearings

Transient Thermoelastohydrodynamic Study of Tilting-Pad Journal Bearings Under Dynamic Loading

1998 ◽  
Vol 120 (2) ◽  
pp. 405-409 ◽  
Author(s):  
P. Monmousseau ◽  
M. Fillon ◽  
J. Freˆne
Keyword(s):  
Steady State ◽  
Dynamic Loading ◽  
Dynamic Load ◽  
Journal Bearings ◽  
Operating Conditions ◽  
Maximum Temperature ◽  
Tilting Pad ◽  
Transient Period ◽  
Final Steady State ◽  
Tilting Pad Journal Bearings

Nowadays, tilting-pad journal bearings are submitted to more and more severe operating conditions. The aim of this work is to study the thermal and mechanical behavior of the bearing during the transient period from an initial steady state to a final steady state (periodic). In order to study the behavior of this kind of bearing under dynamic loading (Fdyn) due to a blade loss, a nonlinear analysis, including local thermal effects, realistic boundary conditions, and bearing solid deformations (TEHD analysis) is realized. After a comparison between theoretical results obtained with four models (ISO, ADI, THD, and TEHD) and experimental data under steady-state operating conditions (static load Ws), the evolution of the main characteristics for three different cases of the dynamic load (Fdyn/Ws < 1, Fdyn/Ws = 1 and Fdyn//Ws > 1) is discussed. The influence of the transient period on the minimum film thickness, the maximum pressure, the maximum temperature, and the shaft orbit is presented. The final steady state is obtained a long time after the appearance of a dynamic load.

Measurement of friction force and effects of oil fortifier in engine journal bearings under dynamic loading conditions

2003 ◽  
Vol 36 (8) ◽  
pp. 599-607 ◽  
Author(s):  
Ertuğrul Durak ◽  
Cahit Kurbanoğlu ◽  
Aydın Bıyıklıoğlu ◽  
Hakan Kaleli
Keyword(s):  
Dynamic Loading ◽  
Friction Force ◽  
Journal Bearings ◽  
Loading Conditions ◽  
Dynamic Loading Conditions

A NEW TEST APPARATUS AND METHOD FOR FRICTION FORCE MEASUREMENT IN JOURNAL BEARINGS UNDER DYNAMIC LOADING: PART II

2005 ◽  
Vol 29 (6) ◽  
pp. 33-36 ◽  
Author(s):  
A. Biyiklioglu ◽  
H. Cuvald ◽  
H. Adatepe ◽  
H. Bas ◽  
M.S. Duman
Keyword(s):  
Dynamic Loading ◽  
Friction Force ◽  
Force Measurement ◽  
Journal Bearings ◽  
Test Apparatus

Cyclic Squeeze Films in Micropolar Fluid Lubricated Journal Bearings

1976 ◽  
Vol 98 (3) ◽  
pp. 412-417 ◽  
Author(s):  
J. Prakash ◽  
P. Sinha
Keyword(s):  
Dynamic Behavior ◽  
Dynamic Loading ◽  
Micropolar Fluid ◽  
Reynolds Equation ◽  
Journal Bearing ◽  
Journal Bearings ◽  
Detailed Consideration ◽  
Sinusoidal Load ◽  
Fluid Theory ◽  
Curve Form

The Reynolds equation for the general case of dynamic loading is derived for fluid suspensions, using the micropolar fluid theory. Detailed consideration is given to the dynamic behavior of squeeze films in journal bearings under a fluctuating load with no journal rotation. The characteristics of an infinitely long journal bearing under a cyclic sinusoidal load are shown in curve form, so as to elaborate the micropolar effects.

A NEW TEST APPARATUS AND METHOD FOR FRICTION FORCE MEASUREMENT IN JOURNAL BEARINGS UNDER DYNAMIC LOADING: Part I

2005 ◽  
Vol 29 (5) ◽  
pp. 22-24 ◽  
Author(s):  
A. Biyiklioglu ◽  
H. Cuvalci ◽  
H. Adatepe ◽  
H. Bas ◽  
M.S. Duman
Keyword(s):  
Dynamic Loading ◽  
Friction Force ◽  
Force Measurement ◽  
Journal Bearings ◽  
Test Apparatus
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