Buscar
Mostrando ítems 1-10 de 240
Topology optimization of buildings subjected to stochastic wind loads
(2021)
Traditionally, the main structural system of tall buildings is designed iteratively to resist extreme wind loads, which provides safe, but typically suboptimal building systems. Topology optimization provides a general ...
Numerical framework for stress cycle assessment of cables under vortex shedding excitations
(Techno Press, 2019)
Copyright © 2019 Techno-Press, Ltd.In this paper a novel and efficient computational framework to estimate the stress range versus number of cycles curves experienced by a cable due to external excitations (e.g., seismic ...
Experimental analysis of harmonic distortions in the excitation currents of double-excited three-phase transformers
(Institute of Electrical and Electronics Engineers (IEEE), 2000-01-01)
This paper shows the results of experimental investigations of three-phase banks composed of single-phase transformers and three-phase three-limb core transformers under simultaneous alternating and direct current excitations, ...
Experimental analysis of harmonic distortions in the excitation currents of double-excited three-phase transformers
(Institute of Electrical and Electronics Engineers (IEEE), 2000-01-01)
This paper shows the results of experimental investigations of three-phase banks composed of single-phase transformers and three-phase three-limb core transformers under simultaneous alternating and direct current excitations, ...
Tenuous solar winds: Insights on solar wind–magnetosphere interactions
(Elsevier, 2008-02)
During solar cycle 23 quasi-dropouts of the solar wind (density < 1 cm_3) were observed. These tenuous winds allow us to probe properties of the magnetosphere and its coupling to the solar wind which would otherwise be ...
Control of a wind generation system based on a Brushless Doubly-Fed Induction Generator fed by a matrix converter
(Elsevier, 2013)
The Doubly-Fed Induction Generator (DFIG) is one of the most widely used generators for wind energy
applications with more than 50% of installed Wind Energy Conversion Systems (WECS) using this variable
speed technology. ...
The role of core and strahlo electrons properties on the whistler heat-flux instability thresholds in the solar wind
(Frontiers Media, 2022)
There is wide observational evidence that electron velocity distribution functions (eVDF) observed in the solar wind generally present enhanced tails and field-aligned skewness. These properties may induce the excitation ...
A nonlinear and non-ideal wind generator supporting structure
(Trans Tech Publications Ltd, 2006-01-01)
We present a simple mathematical model of a wind turbine supporting tower. Here, the wind excitation is considered to be a non-ideal power source. In such a consideration, there is interaction between the energy supply and ...