scholarly journals Multilayer Finite-Element Model Application to Define the Bearing Structure Element Stress State of Launch Complexes

2016 ◽  
Vol 16 (06) ◽  
pp. 27-37
Author(s):  
V Zverev ◽  
V Lomakin
Keyword(s):  
Finite Element ◽  
Stress State ◽  
Finite Element Model ◽  
Element Model ◽  
Model Application ◽  
Bearing Structure

Finite element model application to flexural behavior of cement stabilized soil block masonry

2020 ◽  
Vol 53 (3) ◽  
Author(s):  
David A. Weed ◽  
Adam G. Tennant ◽  
Mohammad Hosein Motamedi ◽  
K. Gourav ◽  
Craig D. Foster ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Flexural Behavior ◽  
Model Application ◽  
Soil Block ◽  
Stabilized Soil

scholarly journals GROUND OF PARAMETERS OF DISCRETISATION AT THE NUMERICAL ANALYSIS OF NON-CIRCULAR OUTLINE TUNNELS

2017 ◽  
pp. 20-29
Author(s):  
V. P. KUPRIY ◽  
O. L. TIUTKIN ◽  
P. YE. ZAKHARCHENKO
Keyword(s):  
Finite Element ◽  
Stress State ◽  
Numerical Analysis ◽  
Finite Element Model ◽  
Element Model ◽  
Finite Element Models ◽  
Railway Tunnel ◽  
Tunnel Support ◽  
Strain Stress ◽  
Circular Outline

Purpose. Influence on the strain-stress state of discretization of finite element model in the numerical analysis of non-circular outline tunnels is explored in the article. Methodology. For achievement of the put purpose, authors developed three finite element models of callote part at building of two-line railway tunnel. In each of models in a programmatic complex «Lira» was a concrete method of discretization area of cooperation with the temporal fastening. After creation of models, their numerical analysis with the detailed research of his results was conducted. Findings. The values of deformations and tensions of finite element models on horizontal and vertical axes, and also maximal values of moments and longitudinal forces in the temporal support are got. The comparative analysis of the got values is conducted. The graphs of conformities to the law of the indicated results from the features of discretization of two models are built. The third finite element model with the radial laying out of knots in the area of co-operation of the temporal fastening with the surrounding ground array is explored. Originality. It is set that at the numerical analysis of SSS of tunnel support of non-circular outline his results substantially depend on a form, sizes and configuration of the applied finite elements, from the sizes of calculation area of the ground massif, and also from the terms of his fixing (maximum terms). Practical value. The features of discretization and necessary sizes of calculation area of the ground massif at the design of the system are certain «support – ground massif », which provide sufficient exactness of calculation of parameters of the strain-stress state of support.

Research on the Effects of the Generator with Differential Supporting Characteristics on Vibrations of the Three-Bearing Structure

2014 ◽  
Vol 955-959 ◽  
pp. 886-889
Author(s):  
Qing Meng Zeng ◽  
Zheng Feng Wu ◽  
Shan Shan Zhang ◽  
Qin Han ◽  
Jun He
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Harmonic Component ◽  
Element Model ◽  
Axial Position ◽  
Component Method ◽  
Set Up ◽  
Bearing Structure ◽  
The Finite Element Model

The finite element model of a 1000MW unit was set up and vibrations of the three-bearing structure were studied. The results show that the generator supporting characteristics have great effects on vibrations of the three-bearing structure. Many factors are needed to be considered when field balancing. The generator supporting characteristics should be considered when judging the type and axial position of imbalances. Repeated balancing are invalid and even the vibrations diverge if just following simply the harmonic component method to determine directly the imbalance types. The conclusion reliabilities were further verified with the tests.

A New Fully-Detailed Finite Element Model of Spiral Strand Wire Ropes for Fatigue Life Estimate of a Mooring Line

2019 ◽  
Author(s):  
Federico Bussolati ◽  
Martin Guiton ◽  
Pierre-Alain Guidault ◽  
Yann Poirette ◽  
Michael Martinez ◽  
...  
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Stress State ◽  
Finite Element Model ◽  
Limit State ◽  
Element Model ◽  
Offshore Wind Turbine ◽  
Mooring Lines ◽  
Wire Ropes ◽  
The Wire

Abstract Spiral strand wire ropes are commonly used in the mooring system of offshore structures. When dealing with the fatigue limit state, engineers have to consider many different load cases, according to the variability of the environmental state. This usually prevents the use of any detailed numerical model of the mooring lines. In this paper, we propose a new method to evaluate with an affordable computational cost the detailed mechanical stress state in different parts of the wire ropes used for mooring a floating offshore wind turbine. We first compute tension and bending history in the mooring, with the hydrodynamic software Deeplines™, assuming for simplification stationary aerodynamic loads on the floater. These time series are then accounted for in a novel Finite Element Model of the spiral strand, with small sliding among the wires. The obtained kinematics and stress state of the wires can then feed a fatigue law based on fretting fatigue, which has been experimentally evidenced to condition the fatigue life of spiral strand wire ropes. The potential of this method is illustrated with an application to a cylinder-like shape floater equipped with 3 pairs of catenary mooring lines. It is shown that bending and tension histories do not significantly depend on the wire rope bending stiffness.

Finite Element Simulation of Tire-Rim Interface

1989 ◽  
Vol 17 (4) ◽  
pp. 305-325 ◽  
Author(s):  
N. T. Tseng ◽  
R. G. Pelle ◽  
J. P. Chang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Finite Element Simulation ◽  
Contact Pressure ◽  
Element Model ◽  
Experimental Measurements ◽  
Inflation Pressure ◽  
Interference Fit ◽  
Element Simulation ◽  
Rubber Composite

Abstract A finite element model was developed to simulate the tire-rim interface. Elastomers were modeled by nonlinear incompressible elements, whereas plies were simulated by cord-rubber composite elements. Gap elements were used to simulate the opening between tire and rim at zero inflation pressure. This opening closed when the inflation pressure was increased gradually. The predicted distribution of contact pressure at the tire-rim interface agreed very well with the available experimental measurements. Several variations of the tire-rim interference fit were analyzed.

Torsional Analysis of a Steel Cord-Rubber Tire Belt Structure

1996 ◽  
Vol 24 (4) ◽  
pp. 339-348 ◽  
Author(s):  
R. M. V. Pidaparti
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Composite Structures ◽  
Three Dimensional ◽  
Element Model ◽  
Torsional Stiffness ◽  
Element Analysis ◽  
Rubber Belt ◽  
Steel Cord ◽  
Torsional Analysis

Abstract A three-dimensional (3D) beam finite element model was developed to investigate the torsional stiffness of a twisted steel-reinforced cord-rubber belt structure. The present 3D beam element takes into account the coupled extension, bending, and twisting deformations characteristic of the complex behavior of cord-rubber composite structures. The extension-twisting coupling due to the twisted nature of the cords was also considered in the finite element model. The results of torsional stiffness obtained from the finite element analysis for twisted cords and the two-ply steel cord-rubber belt structure are compared to the experimental data and other alternate solutions available in the literature. The effects of cord orientation, anisotropy, and rubber core surrounding the twisted cords on the torsional stiffness properties are presented and discussed.

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