The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This work aims to perform an analysis of different numerical and analytical prediction techniques for obtaining the impedance of grounding systems in power substations according to the Fall-of-Potential Method. A test field with 4 grounding meshes of different geometric configurations was implemented and used to evaluate the quality of the results obtained in this study. Two analytical models found...
The beam-slab type foundation is a new type of Wind Turbine Generators Tower Foundation. It has advantages over traditional foundation in being more convenience and reasonable. Here the finite element analysis software ANSYS is being used to get the reasonable disposal of the s beam-slab type foundation and analyze the static characteristics of the new structure such as stress, displacement and settlement...
In the two-dimensional geo-electric model, the tipper response of magnetotelluric(MT) depends on the numerical simulation TE mode. Firstly, the boundary value problem and variational problem were shown, and the finite element method was used for element subdivision, interpolation, integration and general synthesis. Secondly, the electric field value of each node was obtained through solving the complex...
The maximum principal stress, von Mises equivalent stress, equivalent creep strain in dissimilar welded joints between martensitic heat-resistant steel (T91) and bainitic heat-resistant steel (G102) are simulated by FEM under the conditions of 833K and inner pressure of 28MPa. The results show that the maximum principal stress and von Mises equivalent stress are quit high in the vicinity of weld/G102...
The distribution of the electricity and the thermal field directly affects the stability, current efficiency and energy consumption of electrolysis cells. In this paper, by using finite element software ANSYS, the thermoelectric field of 2000 A heat recovery aluminum reduction cell model was built. Through the use of APDL, a parametric model was established and then the thermoelectric field was simulated...
Study of radar echoes from the targets in environmental clutters has been of great interest in many applications. In this paper, research works on theoretical modeling and numerical simulations of composite electromagnetic scattering from target and rough surface are briefly reported. It includes GFBM/SAA, Hybrid KA-MoM, FEM with CMPL-DDM-TLQST, FDTD, and BART, developed in this Lab during recent...
The paper deals with studying the mechanical structure of a bulk-micromachined silicon piezoresistive accelerometer by using FEM (Finite Element Method). The vibration modes (resonant frequencies) and sensitivity were predicted. The results of numerical simulation, validated experimentally have pointed out the influence of manufacturing process parameters on the accelerometer performance.
In this paper, we design and demonstrate various transformation media for the development of numerical models for efficient solution of electromagnetic boundary value problems via finite methods. The governing idea is to alter the computational domain of the finite methods by making use of a suitable transformation media, and hence to devise efficient numerical simulation tools that provide uniform...
Failure happens when test carried on one kind of coach seat recliner, such as: gears of locking board were broken, plastic deformation takes place on end of fixing base. A finite element model was set up and numerical simulation was carried on under boundary conditions which are the same with experiment. Results show that the maximum stress occurred at the dedendum of the first gear of locking board,...
The numerical research of vibro-acoustic response to fluid-structure-fluid coupling system caused by acoustic loading needs to be conducted with the help of reliable structural finite element and acoustic boundary element to complete the fluid-structure-fluid coupling calculation. In this paper, discrete Kirchoff quadrilateral (DKQ) bending element and constant strain quadrilateral (CSQ) membrane...
Detachment of greater trochanter (GT) is generally associated with hip arthroplasty complications and needs for repositioning and fixation. A new GT reattachment system (Y3) was proposed to reduce GT displacements in anterior-posterior direction to decrease non-union issues. The goal of this study is to develop and validate a FEM of the Y3 GTR system. FEM validation suggests a good concordance between...
Laser-generated ultrasound is non-contact, broad band, and has multiple propagation modes, and so, has been studied widely in non-destructive testing of structural materials. In this paper, by taking into consideration the fundamental understanding of laser/material interface, and human skin optical properties, the transient temperature distributions in human skin with different thicknesses of the...
Finite element method is introduced to analyze the transmission characteristics of depressed trapezoidal-ridge waveguide in this paper, solves the cutoff wavelength of the dominant mode, bandwidth and field patterns of the typical model size, discussions the influence of the trapezoidal-ridge size on the transmission characteristics. Some numerical results and figures are presented.
In order to apply non-grid-connected wind power to the aluminum electrolysis industry, it is necessary to describe and study characteristics of temperature field of present cell. In this paper, a thermo-electric mathematical model was built up by using ANSYS finite element analysis software, and the 3D coupled thermo-electric field of 400 kA aluminum electrolysis cell was analyzed. It is concluded...
Aiming at the problem of deformation of heavy hydrostatic thrust bearing, finite element method (FEM) is used to conduct its numerical simulation, and the law of the influence of temperature and load on bearing deformation is revealed. Experiment of oil film thickness in different velocity is also made. The results demonstrate that: the free thermal deformation of workbench and base is significant...
This paper studied the internal laws of silencers' acoustic attenuation performance, when the cross-sectional shape, length and diameter of the expansion chamber changed. Based on the BEM-FEM coupled model and to combine with the improved Four-pole Parameters Method, the transmission loss (TL) was calculated. It is pointed that the flatter the expansion chamber is, the worse the performance is. When...
Extrusion process of a large diameter thin-walled aluminum profile was simulated by FEM based on Deform-3D software. The results show that the material flow velocity in the bearing exit of the original designed die is non-uniform. Three times modifications were performed and simulated. The optimal design with more uniform flow velocity in the bearing exit was obtained.
The long gallery type and cylinder type are the two main types of surge shaft in large scale hydropower underground complexes. The assessment method using FEM calculation results to analyze the structural stability of different types of surge shaft in large scale underground complexes is put forward. Firstly, the general FEM procedure to simulate underground excavation is proposed. Then, the FEM-based...
The process of solidification of continuous casting of thin slab on compact strip production (CSP) was simulated by finite element method (FEM) and two-dimensional cutting slice method. Simulated results of solidification and heat transfer of the slab were gotten. The temperature distribution of the cooling process on the thin casting slab is agreed with the actual online production. Influence of...
A mechanical model based on the tightness of bolted flanged connections subjected to external bending moment was developed by numerical simulation with finite element method (FEM), in which creep and relaxation of bolts, flanges and gasket were taken into consideration. The residual stress distribution of gasket under different operating conditions was obtained. The effect of external bending moment...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.