scholarly journals Influence of the Shape of Gear Wheel Bodies in Marine Engines on the Gearing Deformation and Meshing Stiffness

2021 ◽  
Vol 9 (10) ◽  
pp. 1060
Author(s):  
Silvia Maláková ◽  
Michal Puškár ◽  
Peter Frankovský ◽  
Samuel Sivák ◽  
Daniela Harachová
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Load Capacity ◽  
Gear Wheel ◽  
Spur Gear ◽  
The Finite Element Method ◽  
Meshing Stiffness ◽  
Marine Engines ◽  
The Individual ◽  
Body Parameters

The basic properties of gears must be considered: the shape of their gearing, their load capacity, and the meshing stiffness, which affects the noise and vibration. When designing large gears, it is important to choose the correct shape of the gear body. Large gears used in marine gearboxes must be designed with as little weight as possible. The requirements of sufficient stiffness of the gear wheel body, as well as the meshing stiffness, must be met. This paper is devoted to the influence of spur gear wheel body parameters on gearing deformation and meshing stiffness. The stiffness of the gear is solved on the basis of the deformation of the gearing teeth, which is determined by the finite element method. Examples of the simulation and subsequent processing of results demonstrates how the individual parameters of the gear wheel body influence the stiffness of the gearing teeth. At the same time, the results point to designs of suitable shape and dimensions to achieve the required stiffness of the gearing teeth, but with the lowest possible weight of the spur gear wheel body.

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.

Elastic and Plastic Analysis of Drive Wheel’s Hertz Contact

2012 ◽  
Vol 184-185 ◽  
pp. 188-195
Author(s):  
Jun Jie Zhao ◽  
Hong Qi Tian ◽  
Yue Qing Ren ◽  
Zhai Jun Lu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Carrying Capacity ◽  
Rational Design ◽  
Load Capacity ◽  
Contact Theory ◽  
Line Contact ◽  
The Finite Element Method ◽  
Hertz Contact ◽  
Plastic Analysis

Conventional drive wheel strength check is based on Hertz line contact theory to do the calculation, for security reasons, the design is more conservative,so that there is a certain margin in carrying capacity of the wheel. To address the above issues, this paper analyzes the wheel contact problem for a precise non-linear contact by the finite element method. By comparison of two methods, it verifies that using the finite element is reasonable to deal with these issues, while it provides a reference for the rational design of full load capacity wheels as well.

scholarly journals NUMERICAL STUDY ON EFFECTS OF TENON SIZES ON WITHDRAWAL LOAD CAPACITY OF MORTISE AND TENON JOINT

Wood Research ◽  
2021 ◽  
Vol 66 (2) ◽  
pp. 321-330
Author(s):  
Tianxing Zhang ◽  
Wengang Hu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Response Surface ◽  
Numerical Study ◽  
Load Capacity ◽  
The Finite Element Method ◽  
Surface Method ◽  
Mortise And Tenon ◽  
Relationship Of ◽  
The Relationship

The effect of tenon length and tenon width on withdrawal load capacity of mortise and tenon (M-T) joint was studied based on the finite element method (FEM), and the relationship of withdrawal load capacity relating to tenon length and tenon width was regressed using response surface method. The results showed that the tenon length and tenon width had remarkable effects on withdrawal load capacity of M-T joint T-shaped sample. The effect of tenon length on withdrawal load capacity was greater than tenon width. The regression equation used to predict the withdrawal load capacity was capable of optimizing the tenon sizes of M-T joint with R-square of 0.926. Using FEM can get more knowledge of M-T joint visually, and reduce the costs of materials and time of experiments.

Simple Stress Formulae for a Thin-Rimmed Spur Gear. Part 1: Derivation of Approximation Formulae for Tooth Fillet and Root Stresses

1985 ◽  
Vol 107 (3) ◽  
pp. 406-411 ◽  
Author(s):  
Tae Hyong Chong ◽  
A. Kubo
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Spur Gear ◽  
Critical Section ◽  
Radius Of Curvature ◽  
The Finite Element Method ◽  
Calculated Stress ◽  
Supporting Condition ◽  
Simple Stress ◽  
Good Agreement

Using the finite element method, influences of chordal tooth thickness at the critical section of tooth, radius of curvature of fillet, rim thickness, and supporting condition of a thin-rimmed spur gear on the tooth fillet and root stresses are investigated. Summing up a lot of FEM calculated results, a set of approximate formulae is derived for the calculation of tooth fillet and root stresses of a thin-rimmed spur gear. A comparison between the FEM calculated stress values and the values from these approximation formulae has shown good agreement.

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.

Calculation of the Dynamic Coefficients of a Journal Bearing, Using a Variational Approach

1986 ◽  
Vol 108 (3) ◽  
pp. 421-424 ◽  
Author(s):  
P. Klit ◽  
J. W. Lund
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Variational Approach ◽  
Numerical Evaluation ◽  
Reynolds Equation ◽  
Journal Bearing ◽  
Temperature Dependency ◽  
The Finite Element Method ◽  
Dynamic Coefficients ◽  
The Individual

The dynamic bearing coefficients are obtained from a solution to the variational equivalent of Reynolds equation. A perturbation method is applied to find the individual dynamic coefficients. The Finite Element Method is used in the numerical evaluation of the equations. The flow is assumed to be laminar, the lubricant is Newtonian. Allowance is made for viscosity-temperature dependency in circumferential and axial directions.

An Evaluation of Stresses and Deflection of Spur Gear Teeth Under Strain

1974 ◽  
Vol 96 (1) ◽  
pp. 85-93 ◽  
Author(s):  
G. Chabert ◽  
T. Dang Tran ◽  
R. Mathis
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Static Load ◽  
Simple Calculation ◽  
Spur Gear ◽  
Spur Gears ◽  
The Finite Element Method ◽  
Gear Teeth ◽  
Pressure Angle ◽  
Maximum Stresses

This paper aims at an evaluation of the stresses induced by a static load applied to gear teeth. For spur gears of different ratios with 20-deg pressure angle and standard addendum proportions, the stresses and deflections are computed by the finite element method. Formulas are drawn allowing a simple calculation of the maximum stresses, and the results are compared with what is given by ISO and AGMA standards related to the strength of gear teeth.

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