Load capacity and flow characteristics of a hydrostatically lubricated four-pocket journal bearing by finite element method

1976 ◽  
Vol 16 (4) ◽  
pp. 233-240 ◽  
Author(s):  
R.C. Ghai ◽  
D.V. Singh ◽  
R. Sinhasan
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Journal Bearing ◽  
Load Capacity ◽  
Flow Characteristics ◽  
Element Method

Determination of the Load Capacity of a Finite Width Journal Bearing by a Finite-Element Method in the Case of a Non-Newtonian Lubricant

1984 ◽  
Vol 106 (2) ◽  
pp. 285-290 ◽  
Author(s):  
P. Bourgin ◽  
B. Gay
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Journal Bearing ◽  
Load Capacity ◽  
Nonlinear Partial Differential Equation ◽  
Strain Tensor ◽  
Finite Width ◽  
Gradient Technique ◽  
Element Method

Additives are commonly used to improve the performance of lubricating oils. Correlatively, the lubricant viscosity depends on the rate of shear: the fluid becomes non-Newtonian. Assuming that the nonlinear relationship between the rate of strain tensor and the stress tensor is cubic, the film equations are derived within the approximations of lubrication theory. The governing equation, which generalizes the Reynolds’ equation, is a nonlinear partial differential equation, subject to two nonlinear constraints. The particular case of a finite width journal bearing is considered here; this problem is solved by the finite-element method, using a gradient technique. The numerical results are compared with established results for newtonian lubricants. The influence of the non-Newtonian parameter on the pressure field and on the bearing capacity is predicted.

Variational Formulation and Associated Algorithm for the Starved Finite Journal Bearing

1983 ◽  
Vol 105 (3) ◽  
pp. 453-457 ◽  
Author(s):  
G. Bayada
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Variational Formulation ◽  
Flow Parameter ◽  
Journal Bearing ◽  
Numerical Treatment ◽  
Inlet Flow ◽  
Variational Form ◽  
Element Method

This paper is a contribution to the numerical treatment of the cavitation in a finite journal bearing when starvation takes place. A new variational form taking account the inlet flow parameter is given and allows us to compute rupture and reformation boundary together with the performances of the bearing via finite element method.

Analysis of Aerodynamic Journal Bearings With Small Number of Herringbone Grooves by Finite Element Method

1994 ◽  
Vol 116 (4) ◽  
pp. 698-704 ◽  
Author(s):  
D. Bonneau ◽  
J. Absi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Study ◽  
Load Capacity ◽  
Journal Bearings ◽  
The Finite Element Method ◽  
Bearing Number ◽  
Comparison Of The Results ◽  
Herringbone Grooves ◽  
Element Method

A numerical study of gas herringbone grooved journal bearings is presented for small number of grooves. The compressible Reynolds equation is solved by use of the Finite Element Method. The nonlinearity of the discretized equations is treated with the Newton-Raphson procedure. A comparison of the results for a smooth bearing with previously published results is made and the domain of validity of the Narrow Groove Theory is analyzed. Load capacity, attitude angle, and stiffness coefficients are given for various configurations: groove angle and thickness of grooves, bearing number, and that for both smooth and grooved member rotating.

A study of slot-entry hydrostatic/hybrid journal bearing using the finite element method

1999 ◽  
Vol 32 (4) ◽  
pp. 185-196 ◽  
Author(s):  
Satish C Sharma ◽  
Vijay Kumar ◽  
S.C Jain ◽  
R Sinhasan ◽  
M Subramanian
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Journal Bearing ◽  
The Finite Element Method ◽  
Element Method

Static and Dynamic Analysis of Capillary Compensated Hydrostatic Journal Bearings by Finite Element Method

1977 ◽  
Vol 99 (4) ◽  
pp. 478-484 ◽  
Author(s):  
D. V. Singh ◽  
R. Sinhasan ◽  
R. C. Ghai
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Journal Bearing ◽  
Dynamic Performance ◽  
Critical Mass ◽  
Equations Of Motion ◽  
Stability Studies ◽  
Static And Dynamic Analysis ◽  
Bearing System ◽  
Element Method

Using finite element method steady state and dynamic performance of a capillary compensated hydrostatic journal bearing have been investigated. For stability studies, the critical mass of the bearing system has been determined by Routh’s criterion. The locus of the journal center has been predicted by discretizing time and numerically integrating the equations of motion governing the journal bearing system.

Analysis of the Nominal Load Effects on Gear Load Capacity Using the Finite-Element Method

2010 ◽  
Vol 224 (11) ◽  
pp. 2539-2548 ◽  
Author(s):  
I Atanasovska ◽  
R Mitrović ◽  
D Momĉilović ◽  
A Subic
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Significant Influence ◽  
Load Distribution ◽  
Load Capacity ◽  
The Finite Element Method ◽  
Gear Teeth ◽  
Load Effects ◽  
Nominal Load ◽  
Element Method

This research investigates the effects of the nominal load value on load distribution of simultaneously meshing gear teeth pairs, and on the involute gear load capacity. The research results presented in this article confirm that the nominal load value has a significant influence on the gear load capacity calculations. However, this influence is generally neglected in standard gear calculations, which can result in oversized gear dimensions. This can lead to inadequate gear designs in practice due to increased demand for reduced gear size and weight in modern machinery. The article provides a detailed description of the iterative numerical method developed in this research to support the modelling and analysis of load distribution in meshed gears using the finite-element method.

An Investigation of the Characteristics of Electromagnetic Bearings Using the Finite Element Method

1994 ◽  
Vol 116 (4) ◽  
pp. 710-719 ◽  
Author(s):  
Foam-Zone Hsiao ◽  
An-Chen Lee
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Load Capacity ◽  
Nonlinear Behavior ◽  
Ball Bearings ◽  
The Finite Element Method ◽  
Nonlinear Characteristics ◽  
Nonlinear Relation ◽  
Flux Leakage ◽  
Element Method

The load capacity of EMBs with a restricted air gap is usually small in comparison with that of traditional ball bearings. One possible way to overcome this limitation is to increase the operation field strength of EMBs; however, this approach unavoidably involves nonlinear characteristics of EMBs. This paper investigates the nonlinear behavior of two commonly used types of EMBs by using the finite element method, in which the nonlinear relation of the B-H curve, the flux leakage, and the fringing effect are taken into account. The behavior of the EMBs under different bias currents and gap lengths is investigated, as are the effects of geometric parameters on the bearing characteristics. The results of the paper provide a useful guide for designing EMBs when using their nonlinear characteristics.

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