Elementary Calculations for Deflection of Circular Rings

2017 ◽  
pp. 115-122
Author(s):  
Géza Németh
Keyword(s):  
Circular Rings

A NEW METHOD FOR IN-PLANE VIBRATION ANALYSIS OF CIRCULAR RINGS WITH WIDELY DISTRIBUTED DEVIATION

2002 ◽  
Vol 254 (4) ◽  
pp. 787-800 ◽  
Author(s):  
Y.J. YOON ◽  
J.M. LEE ◽  
S.W. YOO ◽  
H.G. CHOI
Keyword(s):  
Vibration Analysis ◽  
New Method ◽  
Plane Vibration ◽  
Circular Rings

scholarly journals Analysis of Capacitance to Ground Formulas for Different High-Voltage Electrodes

Energies ◽  
2018 ◽  
Vol 11 (5) ◽  
pp. 1090 ◽  
Author(s):  
Jordi-Roger Riba ◽  
Francesca Capelli
Keyword(s):  
High Voltage ◽  
Fem Simulation ◽  
Operating Conditions ◽  
Power Supplies ◽  
Measuring Instruments ◽  
Stray Capacitance ◽  
Analytical Formulas ◽  
Circular Rings ◽  
Available Information ◽  
Limited Scope

Stray capacitance can seriously affect the behavior of high-voltage devices, including voltage dividers, insulator strings, modular power supplies, or measuring instruments, among others. Therefore its effects must be considered when designing high-voltage projects and tests. Due to the difficulty in measuring the effects of stray capacitance, there is a lack of available experimental data. Therefore, for engineers and researchers there is a need to revise and update the available information, as well as to have useful and reliable data to estimate the stray capacitance in the initial designs. Although there are some analytical formulas to calculate the capacitance of some simple geometries, they have a limited scope. However, since such formulas can deal with different geometries and operating conditions, it is necessary to assess their consistency and applicability. This work calculates the stray capacitance to ground for geometries commonly found in high-voltage laboratories and facilities, including wires or rods of different lengths, spheres and circular rings, the latter ones being commonly applied as corona protections. This is carried out by comparing the results provided by the available analytical formulas with those obtained from finite element method (FEM) simulation, since field simulation methods allow solving such problem. The results of this work prove the suitability and flexibility of the FEM approach, because FEM models can deal with wider range of electrodes, configurations and operating conditions.

Flexural vibrations of nonlinearly elastic circular rings

Meccanica ◽  
2014 ◽  
Vol 50 (3) ◽  
pp. 689-705 ◽  
Author(s):  
Walter Lacarbonara ◽  
Andrea Arena ◽  
Stuart S. Antman
Keyword(s):  
Circular Rings ◽  
Flexural Vibrations ◽  
Nonlinearly Elastic

Stresses and Displacements on the Boundaries of Circular Rings Diametrically Loaded

1986 ◽  
Vol 53 (1) ◽  
pp. 213-219 ◽  
Author(s):  
A. J. Durelli ◽  
Y. H. Lin
Keyword(s):  
Cross Section ◽  
Rectangular Cross Section ◽  
Boundary Values ◽  
Structural Applications ◽  
Circular Rings

The paper deals with stresses and displacements in circular rings of rectangular cross-section, loaded in the plane and perpendicular to the boundary. Values are given for all points at the inside and outside boundaries, are presented parametrically for rings for which the ratio of diameters ID/OD varies from 0 to very close to 1, and have been obtained from several sources, mainly Nelson’s equations. References to some previous contributions are included. The information presented in the paper was not available in a complete manner and will be useful in numerous structural applications. The analysis corresponding to loads applied tangentially to the boundary could be approached in a similar manner.

Spring constants of filament-wound composite circular rings

2001 ◽  
Vol 215 (2) ◽  
pp. 211-226 ◽  
Author(s):  
P C Tse ◽  
S R Reid ◽  
S P Ng
Keyword(s):  
Three Dimensional ◽  
Element Analysis ◽  
Closed Form Solutions ◽  
Composite Ring ◽  
Filament Wound ◽  
Dimensional Finite Element ◽  
Filament Wound Composite ◽  
Circular Rings ◽  
Three Dimensional Finite Element ◽  
Wound Composite

Closed-form solutions from complementary strain energy are derived for the spring stiffnesses of mid-surface symmetric, filament-wound, composite circular rings under unidirectional loading. A three-dimensional finite element analysis (FEA) including the effects of transverse shear has also been applied to study the problem. Four > 45° and four > 75° E-glass/epoxy composite rings of odd numbers of covers were tested. Comparisons of the results obtained from the two methods with experimental data are made and the results are found to be in good agreement. The FEA prediction of stiffness is always higher than the theoretical result. The relationships between the spring stiffnesses and the winding angles and geometry of the filament-wound composite ring are considered and discussed.

scholarly journals Transient thermal stresses in fully and partly cooled circular rings

1986 ◽  
Vol 26 (4) ◽  
pp. 312-312
Author(s):  
Toshihiro Iwaki
Keyword(s):  
Thermal Stresses ◽  
Circular Rings ◽  
Transient Thermal

Edge Effects in Axial Arrays of Circular Rings

2006 ◽  
Vol 54 (2) ◽  
pp. 544-553 ◽  
Author(s):  
S. Li ◽  
R.W. Scharstein
Keyword(s):  
Edge Effects ◽  
Circular Rings
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