scholarly journals APPLICATION OF THE RESULTS OF THE FOCUSED DEFORMATION METHOD TO THE RESULTS OF NUMERICAL EXPERIMENTS BASED ON THE FINITE ELEMENT METHOD

2020 ◽  
pp. 140-146
Author(s):  
T. Bolotbek ◽  
J.T. Temirkanova ◽  
A. Nurlan uulu ◽  
J. Toychu kyzy ◽  
A. Askarova
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Experiments ◽  
The Finite Element Method ◽  
Deformation Method ◽  
Theoretical Justification ◽  
Solid Foundation ◽  
Element Method

The article discusses the application of solid foundation slabs in the base and the theoretical justification for the approximation of the method of concentrated deformations to the results of numerical experiments based on the finite element method.

The finite element method for solving the oblique derivative boundary value problems in geodesy

2020 ◽  
Author(s):  
Marek Macák ◽  
Zuzana Minarechová ◽  
Róbert Čunderlík ◽  
Karol Mikula
Keyword(s):  
Finite Element Method ◽  
Boundary Condition ◽  
Finite Element ◽  
Numerical Experiments ◽  
Boundary Value ◽  
Satellite Orbits ◽  
The Finite Element Method ◽  
Hexahedral Elements ◽  
Grid Points ◽  
Element Method

<p>We present a novel approach to the solution of the geodetic boundary value problem with an oblique derivative boundary condition by the finite element method. Namely, we propose and analyse a finite element approximation of a Laplace equation holding on a domain with an oblique derivative boundary condition given on a part of its boundary. The oblique vector in the boundary condition is split into one normal and two tangential components and derivatives in tangential directions are approximated as in the finite difference method. Then we apply the proposed numerical scheme to local gravity field modelling. For our two-dimensional testing numerical experiments, we use four nodes bilinear quadrilateral elements and for a three-dimensional problem, we use hexahedral elements with eight nodes. Practical numerical experiments are located in area of Slovakia that is given by grid points located on the Earth's surface with uniform spacing in horizontal directions. Heights of grid points are interpolated from the SRTM30PLUS topography model. An upper boundary is in the height of 240 km above a reference ellipsoid WGS84 corresponding to an average altitude of the GOCE satellite orbits. Obtained solutions are compared to DVRM05.</p>

Study on the Parameters of Piercing Die with Finite Element Method

2013 ◽  
Vol 690-693 ◽  
pp. 2265-2269
Author(s):  
Yan Xiong Yang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Experiment ◽  
Numerical Experiments ◽  
Influential Factor ◽  
Optimal Parameters ◽  
The Finite Element Method ◽  
Element Method

This paper focused on the piercing process in order to obtain the optimum mold parameters with the finite element method. In present investigation, the clearance, punch-die round radius and the interaction of between clearance and punch-die round radius were studied by simulating the piercing operation of a Q235 sheet. Simulation used the FEM program ANSYS. The results of the present paper showed that clearance was the most influential factor for piercing, and numerical experiments was an effectiveness method to get optimal parameters of mold parameters, and the numerical experiment results showed that the best clearance could be got.

The Optimum of Clearance for Mold in the Piercing Process with Finite Element Method

2013 ◽  
Vol 321-324 ◽  
pp. 324-328
Author(s):  
Yu Yang ◽  
Cun Ping Liu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Experiment ◽  
Numerical Experiments ◽  
Sheet Material ◽  
Influential Factor ◽  
Optimal Parameters ◽  
The Finite Element Method ◽  
Element Method

Present work describes a piercing process in order to investigate the clearance of mold parameters and to obtain optimal clearance values for a given sheet material and thickness to be pierced, using the finite element method. The clearance was studied by simulating the piercing operation of a Q235-B sheet. The results of the present paper showed that clearance was the most influential factor for piercing, and numerical experiments was an effectiveness method to get optimal parameters of mold parameters, and the numerical experiment results showed that the best clearance could be got when the ratio of clearance and thickness of material was 0.11.

scholarly journals Rationalization of the constructive form of towers with prestressed cables

2019 ◽  
Vol 15 (3) ◽  
pp. 182-192
Author(s):  
Ivan R. Sitnikov ◽  
Alexander V. Golikov
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Experiments ◽  
Strain State ◽  
The Finite Element Method ◽  
Mathematical Planning ◽  
Stress Strain ◽  
Stress Strain State ◽  
Planning Of Experiments ◽  
Element Method

Relevance. One of the main directions of development of mobile communication systems, radio engineering and telecommunication systems is the improvement of the structural form of the bearing supports, which will solve a number of practical tasks: to increase the coverage area, to ensure higher rates of data transmission speed and to ensure stable operation in an increasing number of users. These circumstances justify the relevance of research in this direction. Aims of research. Optimization of design solutions using parallel puffs, ensuring the possibility of erection and safe operation during the entire service life, which ensures that the requirements for strength, stability and deformations for such structures are met with minimal material consumption. Methods. For calculations, finite element methods are used for mathematical modeling using software and computing systems. To create linear models for numerical experiments, the method of mathematical planning of experiments was used. Results. The work of the towers of the proposed constructive solution is considered as supports for the placement of equipment of cellular operators using the example of a 42-meter tower. The method of mathematical planning of experiments was used to create a model line for numerical experiments. To establish the basic characteristics of the stress-strain state of the structures of the supports, a number of models were created and calculated in software packages, the basis of which is the finite element method. A comparative analysis of the effort in the delays determined by analytical calculation and the finite element method is performed. The analysis of changes in the stress-strain state of the towers from the influence of influencing factors, such as wind and icy-wind loads, the angle of deflection on the lower tier of the tower. By the criterion of minimum metal consumption and manufacturability of the construction of towers, rational overall dimensions of the tower were determined. The options for constructing the main junctions of the elements of the tower are proposed.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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