scholarly journals NUMERICAL ANALYSES ON PROGRESSIVE FAILURE OF SLOPE DUE TO HEAVY RAIN WITH 2D AND 3D FEM

2005 ◽  
Vol 45 (2) ◽  
pp. 1-15 ◽  
Author(s):  
GUANLIN YE ◽  
FENG ZHANG ◽  
ATSUSHI YASHIMA ◽  
TAKETOMI SUMI ◽  
TAKESHI IKEMURA
Keyword(s):  
Progressive Failure ◽  
Heavy Rain ◽  
Numerical Analyses ◽  
3D Fem ◽  
2D And 3D

scholarly journals Electromagnetic Analysis and Comparison of Conventional-Wound Cores and Octagonal-Wound Cores of Distribution Transformers

2010 ◽  
Vol 670 ◽  
pp. 477-486 ◽  
Author(s):  
I. Hernández ◽  
J.M. Cañedo ◽  
J.C. Olivares-Galván ◽  
Pavlos S. Georgilakis
Keyword(s):  
Eddy Current ◽  
Electromagnetic Analysis ◽  
Excitation Current ◽  
3D Fem ◽  
Electrical Steels ◽  
Eddy Current Losses ◽  
Distribution Transformers ◽  
Core Losses ◽  
Comparative Results ◽  
2D And 3D

This paper presents comparative results of an electromagnetic study performed in two different wound core transformer configurations in order to know the best configuration that reduce excitation current and core losses. The results show that octagonal wound-core (OWC) reduces the excitation current and eddy-current losses with respect conventional-wound core (CWC). The results were obtained applying 2D and 3D FEM simulations, taking into account the non-linear properties of the core. In the last part of this paper, several grades of grain oriented electrical steels and the combination of them are analyzed to find the best mixing percentage to reduce eddy-current losses and excitation current.

scholarly journals An Analysis of Excavation Support Safety Based on Experimental Studies

2015 ◽  
Vol 37 (3) ◽  
pp. 19-29 ◽  
Author(s):  
Karolina Gorska ◽  
Marek Wyjadłowski
Keyword(s):  
Experimental Studies ◽  
Stability Loss ◽  
Numerical Analyses ◽  
Structural Safety ◽  
3D Fem ◽  
Steady Growth ◽  
Excavation Support ◽  
Safety Estimation ◽  
Soldier Pile ◽  
Made In

Abstract The article presents the results of inclinometric measurements and numerical analyses of soldier-pile wall displacements. The excavation under investigation was made in cohesive soils. The measurements were conducted at points located at the edge of the cantilever excavation support system. The displacements of the excavation support observed over the period of three years demonstrated the pattern of steady growth over the first two months, followed by a gradual levelling out to a final plateau. The numerical analyses were conducted based on 3D FEM models. The numerical analysis of the problem comprise calculations of the global structural safety factor depending on the displacement of the chosen points in the lagging and conducted by means of the φ/c reduction procedure. The adopted graphical method of safety estimation is very conservative in the sense that it recognizes stability loss quite early, when one could further load the medium or weaken it by further strength reduction. The values of the Msf factor are relatively high. This is caused by the fact that the structure was designed for excavation twice as deep. Nevertheless, the structure is treated as a temporary one.

scholarly journals Combining 2D and 3D Visualization with Visual Analytics in the Environmental Domain

Information ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 7
Author(s):  
Milena Vuckovic ◽  
Johanna Schmidt ◽  
Thomas Ortner ◽  
Daniel Cornel
Keyword(s):  
Data Visualization ◽  
Visual Analytics ◽  
Simulation Analysis ◽  
3D Visualization ◽  
Heavy Rain ◽  
Daily Practice ◽  
Environmental Domain ◽  
2D Data ◽  
Visualization Techniques ◽  
2D And 3D

The application potential of Visual Analytics (VA), with its supporting interactive 2D and 3D visualization techniques, in the environmental domain is unparalleled. Such advanced systems may enable an in-depth interactive exploration of multifaceted geospatial and temporal changes in very large and complex datasets. This is facilitated by a unique synergy of modules for simulation, analysis, and visualization, offering instantaneous visual feedback of transformative changes in the underlying data. However, even if the resulting knowledge holds great potential for supporting decision-making in the environmental domain, the consideration of such techniques still have to find their way to daily practice. To advance these developments, we demonstrate four case studies that portray different opportunities in data visualization and VA in the context of climate research and natural disaster management. Firstly, we focus on 2D data visualization and explorative analysis for climate change detection and urban microclimate development through a comprehensive time series analysis. Secondly, we focus on the combination of 2D and 3D representations and investigations for flood and storm water management through comprehensive flood and heavy rain simulations. These examples are by no means exhaustive, but serve to demonstrate how a VA framework may apply to practical research.

Analysis of Clay Slopes with Piles Using 2D and 3D FEM

2020 ◽  
Author(s):  
Mohamed Sobhey ◽  
Marawan Shahien ◽  
Mostafa El Sawwaf ◽  
Ahmed Farouk
Keyword(s):  
3D Fem ◽  
2D And 3D ◽  
Clay Slopes

Sound Power Measurements in the Near Field of Transformers

2012 ◽  
Author(s):  
Michael Ertl ◽  
Hermann Landes
Keyword(s):  
Sound Pressure ◽  
Power Level ◽  
Near Field ◽  
Sound Field ◽  
Sound Intensity ◽  
Sound Level ◽  
Numerical Analyses ◽  
Sound Power ◽  
3D Fem ◽  
Sound Power Level

The international standard for the determination of the sound power level of transformers allows both the sound pressure and the sound intensity measurement method. Since the sound measurements take place in the reactive near-field next to the vibrating transformer tank walls, local disturbances influence the sound field characteristics at the measurement positions. As a result, the measured mean sound power level differs commonly up to 6dB at comparative measurements with both methods. Beyond these near field effects, the influence of an industrial measurement environment (background sound sources, hard-reflecting floor, semi-reverberant walls, and standing waves) to the sound pressure and sound intensity field characteristics is investigated. Hereby, numerical analyses based on 3D-FEM with consideration of the fluid-structure-coupling are used. The measured sound level differences can be re-produced and clarified in numerical analyses.

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