Results 1 to 10 of about 18,713 (112)

Fault equivalent model for non-blocking DC fault ride-through of hybrid MMC

open access: yes电力工程技术, 2023
Compared with full-bridge modular multilevel converter (MMC), the hybrid MMC composed of half bridge sub-module and full bridge sub-module has the low cost and high DC fault ride-through capability.
WANG Zeqing   +5 more
doaj   +1 more source

Reconstructing of Embedded High-Aspect-Ratio Nano-Voids Generated by Ultrafast Laser Bessel Beams

open access: yesMicromachines, 2020
Ultrafast non-diffractive Bessel laser beams provide strong light confinement and show robust advantages for fabricating high-aspect-ratio nanoscale structures inside transparent materials.
Tianqu Chen   +5 more
doaj   +1 more source

Lightning Overvoltage Protection of Step-Up Transformer Inside a Nacelle of Onshore New-Generation Wind Turbines

open access: yesEnergies, 2021
This paper presents an electromagnetic transient analysis of lightning-initiated overvoltage stresses of the step-up transformers installed inside a nacelle of onshore, multi-megawatt, new-generation wind turbines.
Petar Sarajcev, Antun Meglic, Ranko Goic
doaj   +1 more source

Transient Dynamic Analysis of Unconstrained Layer Damping Beams Characterized by a Fractional Derivative Model

open access: yesMathematics, 2021
This paper presents a numerical analysis of the influence of mechanical properties and the thickness of viscoelastic materials on the transient dynamic behavior of free layer damping beams.
Mikel Brun   +2 more
doaj   +1 more source

Analysis of Transient Interactions between a PWR Nuclear Power Plant and a Faulted Electricity Grid

open access: yesEnergies, 2021
This paper presents the transient stability analysis of a pressurised water-type nuclear power plant following faults and disturbances affecting the electricity grid to which it is connected.
Vineet Vajpayee   +2 more
doaj   +1 more source

The Finite Element Method with High-Order Enrichment Functions for Elastodynamic Analysis

open access: yesMathematics, 2022
Elastodynamic problems are investigated in this work by employing the enriched finite element method (EFEM) with various enrichment functions. By performing the dispersion analysis, it is confirmed that for elastodynamic analysis, the amount of numerical
Xunbai Du   +3 more
doaj   +1 more source

Electroelastic analysis for a sheared D∞ piezoelectric cylinder disturbed by transient temperature distribution

open access: yesMechanical Engineering Journal, 2023
For safe and sound utilization of the applications made of polylactic acid that output an electric signal to an intended mechanical input within an undesirable thermal environment, the transient thermoelectroelastic field is investigated for an infinite ...
Masayuki ISHIHARA   +2 more
doaj   +1 more source

Transient Analysis of the Flow Behavior under a Small Leakage Accident in Feed Water Pipeline [PDF]

open access: yesJournal of Applied Fluid Mechanics, 2023
Feedwater leakages due to excessive loads and cracking caused by corrosion or fatigue failure can affect the reliability of the production facilities.
A. Dahia   +2 more
doaj   +1 more source

Design and Fabrication of Dual-Scale Broadband Antireflective Structures on Metal Surfaces by Using Nanosecond and Femtosecond Lasers

open access: yesMicromachines, 2019
Antireflective surfaces, with their great potential applications, have attracted tremendous attention and have been the subject of extensive research in recent years.
Rui Lou   +5 more
doaj   +1 more source

The Effect of Dolly Suspension Parameters to the European Modular System Vehicle Combination

open access: yesEuropean Mechanical Science, 2018
The European Modular System (EMS) isintroduced to allow increased vehicle length and weight for road freighttransport. Directive 96/53EC defines the types of combinations for this modularconcept.
Koray Emre Özcan, Enis Gögen
doaj   +1 more source

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