scholarly journals Simulative investigation of ring creep on a planetary bearing of a wind turbine gearbox

2021 ◽  
Author(s):  
Jonas Gnauert ◽  
Felix Schlüter ◽  
Georg Jacobs ◽  
Dennis Bosse ◽  
Stefan Witter
Keyword(s):  
Experimental Data ◽  
Finite Element Method ◽  
Sensitivity Analysis ◽  
Planetary Gear ◽  
The Finite Element Method ◽  
Relative Movement ◽  
Wind Turbine Gearbox ◽  
Interference Fit ◽  
Planetary Gears ◽  
Module Coefficient

AbstractWind turbines (WT) must be further optimized concerning availability and reliability. One of the major reasons of WT downtime is the failure of gearbox bearings. Some of these failures occur, due to the ring creep phenomenon, which is mostly detected in the planetary bearings. The ring creep phenomenon describes a relative movement of the outer ring to the planetary gear. In order to improve the understanding of ring creep, the finite element method (FEM) is used to simulate ring creep in planetary gears. First, a sensitivity analysis is carried out on a small bearing size (NU205), to characterize relevant influence parameters for ring creep—considered parameters are teeth module, coefficient of friction, interference fit and normal tooth forces. Secondly, a full-scale planetary bearing (SL185030) of a 1MW WT is simulated and verified with experimental data.

Research of Flat Crush Performance and Processing Technology for Dual-Core Honeycomb Paperboard

2010 ◽  
Vol 174 ◽  
pp. 521-524
Author(s):  
Ju Han ◽  
Wei Chi Pei ◽  
Xiao Bo Cui
Keyword(s):  
Experimental Data ◽  
Finite Element Method ◽  
Simulation Analysis ◽  
Production Equipment ◽  
Hebei Province ◽  
Processing Technology ◽  
The Finite Element Method ◽  
Compression Performance ◽  
Compression Properties ◽  
Dual Core

To solve the conflict between cost and compressive strength of honeycomb paperboard, dual-core honeycomb paperboard is designed. Based on the processing technology of single-core paperboard, the processing technology of dual-core honeycomb is identified. Using production equipment of Tang Hai Yuan Ming Tangshan, Hebei Province, Ltd. Honeycomb, 110g/m2 and 220g/m2 paper core composed of 20mm thick dual-core honeycomb samples is produced. Through flat compression properties and the finite element method, using two kinds of honeycomb performance of the simulation analysis of experimental data and simulation analysis by the dual data Verify, the level dual-core honeycomb has been a substantial increase in compression performance. Based on dual-core honeycomb paperboard, multi-core paperboard can be designed and produced.

Finite Element Simulation of RC Beam Strengthened with FRP

2012 ◽  
Vol 446-449 ◽  
pp. 3229-3232
Author(s):  
Chao Jiang Fu
Keyword(s):  
Experimental Data ◽  
Finite Element Method ◽  
Finite Element ◽  
Numerical Analysis ◽  
Finite Element Simulation ◽  
Fiber Reinforced Polymer ◽  
Rc Beam ◽  
The Finite Element Method ◽  
Reinforced Polymer ◽  
Element Simulation

The finite element modeling is established for reinforced concrete(RC) beam reinforced with fiber reinforced polymer (FRP) using the serial/parallel mixing theory. The mixture algorithm of serial/parallel rule is studied based on the finite element method. The results obtained from the finite element simulation are compared with the experimental data. The comparisons are made for load-deflection curves at mid-span. The numerical analysis results agree well with the experimental results. Numerical results indicate that the proposed procedure is validity.

Stresses in Thick Pressure Vessel Heads

1990 ◽  
Vol 112 (1) ◽  
pp. 108-114
Author(s):  
A. V. Singh ◽  
V. Kumar
Keyword(s):  
Experimental Data ◽  
Finite Element Method ◽  
Finite Element ◽  
Pressure Vessel ◽  
The Finite Element Method ◽  
Solid Of Revolution ◽  
Wide Range ◽  
Radial Thrust ◽  
Thrust Load ◽  
Spherical Pressure

The finite element method is used to study stresses in two types of spherical pressure vessel heads having very wide range of applications in industries. The first problem involves a nozzle to sphere intersection reinforced by a pad and subjected to radial thrust load. The second problem deals with a pressurized thick hemispherical drumhead with a circular manhole. These structures are modeled using eight-node axisymmetric solid of revolution finite elements. Numerical values of circumferential and meridional stresses from the present analysis show excellent agreement with experimental data from the literature.

scholarly journals Application of classical numerical methods in the calculation of solidification modes of a continuous ingot

2020 ◽  
pp. 41-47
Author(s):  
V. I. Timoshpolsky ◽  
E. I. Marukovich ◽  
I. A. Trusova
Keyword(s):  
Experimental Data ◽  
Finite Element Method ◽  
Finite Element ◽  
Numerical Methods ◽  
Continuous Casting ◽  
Computational Analysis ◽  
The Finite Element Method ◽  
Casting Technology ◽  
Continuous Ingot ◽  
Continuously Cast

This paper presents approaches to the computational analysis of solidification and cooling processes of continuously cast billets in order to improve and develop technological modes in the conditions of modern continuous casting machines using FEM.The application of modern numerical methods for solidification and cooling of workpieces on continuous casting machines is considered. The use of the finite element method is justified when using computational and experimental data for the development and improvement of casting technology.

Probabilistic Optimal Design Using Second Moment Criteria

1988 ◽  
Vol 110 (3) ◽  
pp. 324-329 ◽  
Author(s):  
A. D. Belegundu
Keyword(s):  
Finite Element Method ◽  
Sensitivity Analysis ◽  
Optimal Design ◽  
Design Sensitivity ◽  
Design Criterion ◽  
Second Order ◽  
Design Parameters ◽  
The Finite Element Method ◽  
Programming Technique ◽  
Second Moment

Probability-based optimal design of structures is presented. The emphasis here is to develop a practical approach to optimal design given random design parameters. The method is applicable to structures which are modeled using the finite element method. The Hasofer-Lind (H-L) second-moment design criterion is used to formulate the general design problem. A method for calculating the sensitivity coefficients is presented, which involves second-order design sensitivity analysis. The importance of second order derivatives is established. A nonlinear programming technique is used to solve the problem. Numerical results are presented, where stiffness parameters are treated as random variables.

Sensitivity Analysis of Clay Barriers

1991 ◽  
Vol 24 (11) ◽  
pp. 229-238
Author(s):  
M. M. Nobre ◽  
J. F. Sykes
Keyword(s):  
Finite Element Method ◽  
Sensitivity Analysis ◽  
Unsaturated Flow ◽  
Adjoint Operator ◽  
Pressure Head ◽  
Theoretical Modelling ◽  
Operator Technique ◽  
The Finite Element Method ◽  
The Impact ◽  
Clay Barriers

This paper illustrates the importance of sensitivity analysis in the design of clay barriers. Theoretical modelling simulations are performed using the finite element method in which realistic scenarios for unsaturated flow are conceived. Results show that the adjoint operator technique can be an efficient component to evaluate the impact of the thickness of the clay barriers as well as in the values of hydraulic conductivity values on pressure head distribution and integrated travel time.

Interference Fit Stress Concentrations with Full Chamfered Hub

2013 ◽  
Vol 572 ◽  
pp. 209-212 ◽  
Author(s):  
Juan Carlos Pérez-Cerdán ◽  
Miguel Lorenzo ◽  
Carmen Blanco
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress State ◽  
Quantitative Determination ◽  
Numerical Simulations ◽  
Not Given ◽  
The Finite Element Method ◽  
Stress Concentrations ◽  
Interference Fit

Quantitative determination of stress concentrations factors (SCF) in interference fits joints is highly relevant since they are not given by the theory of pressure cylinders commonly used for designing them. We study the capability of using a full chamfered hub as a geometrical design for reducing SCF. Stresses distributions and stresses concentrations factors are analyzed as a function of parameters that define the hub geometry with the aim of optimizing the design of proposed modified hubs. To achieve this goal, diverse numerical simulations by means of the finite element method (FEM) were carried out in order to quantitatively estimate the stress state existing at hub-shaft interface.

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