Computer Simulations
Mostrando 13-24 de 513 artigos, teses e dissertações.
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13. Sensitivity analysis and optimization for occupant safety in automotive frontal crash test
Abstract Nowadays, safety is a competitive advantage for automotive products and therefore receives considerable attention by automotive research centers. In this paper, a frontal crash test of sedan product of an under development platform is simulated and occupant head injuries are investigated based on ECE R94 regulation. First, an initial evaluation of t
Lat. Am. j. solids struct.. Publicado em: 19/07/2018
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14. Validation of a simplified computer simulation method for plastic forming of metals by conventional tensile tests
Abstract This work was developed in order to validate a simplified computer simulation method for application in the drawing processes. The results of tensile tests on AISI 1004, AISI 1020 steel and copper were compared to those of computer simulations performed using the Deform-3D TM software. Each specimen was assumed to be an elasto-plastic material and w
REM, Int. Eng. J.. Publicado em: 2017-12
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15. Kinetics of Magnetic Ageing of 2%Si Non-oriented Grain Electrical Steel
The effect of carbon content on the magnetic ageing index and Vickers hardness evolution on annealed samples of 2%Si non-oriented grain electrical steel was studied. Samples with 40 and 60ppm carbon content were subjected at ageing temperatures of 200 and 225ºC, respectively. During the ageing treatment, the cycle was interrupted on several time intervals i
Mat. Res.. Publicado em: 23/10/2017
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16. Real-Time Gas Turbine Model for Performance Simulations
ABSTRACT Industry and universities around the world invest time and money to develop digital computer programs to predict gas turbine performance. This study aims to demonstrate a brand new digital model developed with the ability to simulate gas turbine real time high fidelity performance. The model herein described run faster than 30ms per point, which is
J. Aerosp. Technol. Manag.. Publicado em: 2017-09
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17. Temperature field of concrete-filled steel tubular columns in fire
Abstract The composite structures formed by the association of steel profiles with concrete have shown to be an advantageous alternative, improving the behavior of the steel structures concerning their load capacity, stiffness, and durability, under fire conditions. The concrete-filled tubular columns have become an attractive alternative for the civil const
REM, Int. Eng. J.. Publicado em: 2017-06
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18. Adaptive Wideband Beamforming Based on Digital Delay Filter
Abstract A novel adaptive wideband beamforming method is proposed, where beamforming is achieved by LMS based space-time adaptive filtering algorithm. Conventional broadband beamforming requires desired signal to be incident from the broadside i.e. direction normal to the array. The new method overcome this constraint by make use of digital delay filters whi
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-09
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19. Interaction Between Motions of Robotic Manipulator arms and the Non-Fixed base in On-Orbit Operations
ABSTRACT: The objective of this paper is to study the problem of the robotic manipulator operating on a non-fixed base by considering two dynamics scenarios. One in which the base is free to react in response to the robotic manipulator motion and the other in which the robotic manipulator moves its links in such a way to compensate the reaction forces on the
J. Aerosp. Technol. Manag.. Publicado em: 2015-12
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20. Inversion Method for Obtaining Electrical Parameters for Soil in the Rural Region in Brazil
AbstractThis paper presents an inversion methodology through weighted least squares to obtain the electrical parameters for the soil of a typical mid-western region in Brazil using the model based in the formalism of the parabolic equations to calculate the electric field intensity received. To validate this methodology, the results of the radio signal measu
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2015-06
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21. Simulation of the solidification in a channel of a water-cooled glass flow
A computer simulation study of a laminar steady-state glass flow that exits from a channel cooled with water is reported. The simulations are carried out in a two-dimensional, Cartesian channel with a backward-facing step for three different angles of the step and different glass outflow velocities. We studied the interaction of the fluid dynamics, phase cha
Braz. J. Chem. Eng.. Publicado em: 2014-12
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22. Analysis of Radar Cross Section Reduction of Fighter Aircraft by Means of Computer Simulation
ABSTRACT: This paper presents a preliminary study of the Radar Cross Section (RCS) reduction on the fighter aircraft. First, it was studied the RCS of the aircraft from computational simulations based on prior knowledge of vulnerable areas of this aircraft to radar threats. Subsequently, the possible applications of Radar Absorbing Materials (RAM) on the sur
J. Aerosp. Technol. Manag.. Publicado em: 2014-06
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23. All-optical cryptography through spectral amplitude and delay encoding
All-optical data encryption is a promising technology that could lead communication systems to an unprecedented degree of security. In this paper we use computer simulations to systematically investigate a new all-optical cryptography technique that is bit-rate independent and transparent to modulation formats. Encryption encompasses signal spectral slicing
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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24. Visualização exploratória de dados volumétricos multivalorados variantes no tempo / Exploratory visualization of volumetric data multivalued time varying
Simulações por computador permitem reduzir custo e, muitas vezes, realizar experimentos que na vida real seriam impraticáveis, ou por questões ambientais (explosões nucleares), ou por fatores que estão fora do controle do ser humano (colisões entre estrelas). Entretanto, e muito difícil manipular e analisar as centenas de gigabytes, ou mesmo terabyte
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/10/2012