Mesh stiffness models for cylindrical gears: A detailed review

2021 ◽  
Vol 166 ◽  
pp. 104472
Author(s):  
João D.M. Marafona ◽  
Pedro M.T. Marques ◽  
Ramiro C. Martins ◽  
Jorge H.O. Seabra
Keyword(s):  
Mesh Stiffness ◽  
Detailed Review ◽  
Cylindrical Gears

scholarly journals Analytical and FE Determination of the Change of Single Stiffness for Cylindrical Gears with External Involute Teeth

2020 ◽  
Vol 64 (4) ◽  
pp. 289-298
Author(s):  
Dániel Debreczeni ◽  
Gabriella Bognár
Keyword(s):  
Load Capacity ◽  
Applied Pressure ◽  
Analytical Calculation ◽  
Tool Geometry ◽  
Calculation Methods ◽  
Mesh Stiffness ◽  
Cylindrical Gears ◽  
Tooth Number ◽  
The Impact

The calculation of mesh stiffness with required accuracy is essential for determining the contact characteristics of gear pairs. The easiest approximation of the relative stiffness for the basic profile geometries is the so-called single stiffness. Standardized and analytical methods for the determination of the single and mesh stiffness of gears are used to achieve design goals considering the load capacity and the vibration excitation characteristics. Such methods involve the formulas of ISO 6336-1:2006 based on experimental relationships and the equations of Weber and Banaschek based on mechanical calculations. In this paper, guidelines are given to refine the analytical calculations. Our goal is to present the impact of the change of the applied pressure angle, module, load, rim thickness and tooth number on the maximal single stiffness. The profile geometry of the gears is generated with our program in MATLAB. The profile of gears is calculated by the tool geometry and the kinematics of production. The geometry is imported into Abaqus. The sensitivity of the models to different parameters is examined and compared to those obtained by analytical calculations. The benchmarks for the single stiffness are the two most widely used analytical calculation methods in Europe such as ISO 6336-1:2006 formulas and Weber and Banaschek equations.

Upheaval in the distribution of power in the world economy: Problems and outlook of the world economy to 2050

2017 ◽  
pp. 114-127 ◽  
Author(s):  
V. Klinov
Keyword(s):  
Economic Policy ◽  
International Trade ◽  
World Economy ◽  
Emerging Market ◽  
Detailed Review ◽  
Depressed State ◽  
Industry Output ◽  
The World ◽  
Distribution Of Power ◽  
The Eu

Causes of upheaval in the distribution of power among large advanced and emerging market economies in the XXI century, especially in industry output and international trade, are a topic of the paper. Problems of employment, financialization and income distribution inequality as consequences of globalization are identified as the most important. Causes of the depressed state of the EU and the eurozone are presented in a detailed review. In this content, PwC forecast of changes in the world economy by 2050, to the author’s view, optimistically provides for wise and diligent economic policy.

Issues on Design of Piled Raft Foundation

2018 ◽  
Vol 14 (1) ◽  
pp. 6057-6061 ◽  
Author(s):  
Padmanaban M S ◽  
J Sreerambabu
Keyword(s):  
Contact Area ◽  
Concrete Slab ◽  
Design Procedure ◽  
Bending Moment ◽  
Foundation Design ◽  
Detailed Review ◽  
Piled Raft ◽  
Piled Raft Foundation ◽  
Raft Foundation ◽  
Influencing Parameters

A piled raft foundation consists of a thick concrete slab reinforced with steel which covers the entire contact area of the structure, in which the raft is supported by a group of piles or a number of individual piles. Bending moment on raft, differential and average settlement, pile and raft geometries are the influencing parameters of the piled raft foundation system. In this paper, a detailed review has been carried out on the issues on the raft foundation design. Also, the existing design procedure was explained.

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