Top 3 Engrxiv Papers Today in Engineering


2.049 Mikeys
#1. Large Deflection Behavior Effect in Reinforced Concrete Columns Exposed to Extreme Dynamic Loads
Masoud Abedini, Lei Shi, Javad Mehrmashhadi, Chulin Chen, Roozbeh Alipour, Ali Toghroli, Majid Khorami
Reinforced concretes (RC) have been widely used in constructions. In construction, one of the critical elements carrying a high percentage of the weight is columns which were not used to design to absorb large dynamic load like surface bursts. This study focuses on investigating blast load parameters to design more resistant RC columns to blast loads. The numerical model is based on finite element analysis (FEA) using LS-DYNA. Numerical results are validated against blast field tests available online. Couples of simulations are performed with changing blast parameters to study effects of various scaled distances on the nonlinear behavior of RC columns. According to simulation results, the scaled distance has a substantial impact on the blast response of RC columns. With lower scaled distance, higher peak pressure and larger pressure impulse are applied on the RC column. Eventually, keeping the scaled distance unchanged, increasing the charge weight or shorter standoff distance cause more damage to the RC column. Intensive studies...
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engrXiv: "Large Deflection Behavior Effect in Reinforced Concrete Columns Exposed to Extreme Dynamic Loads" - https://t.co/PGwROGae74 #engineering
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Authors: 7
Total Words: 0
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2.006 Mikeys
#2. O wartości i wykorzystaniu danych TAWS/FMS do badania wypadków lotniczych, sprawa lotu Warszawa-Smoleńsk, 10 kwietnia 2010 roku
Andrzej Ziółkowski, Marek Skłodowski
Poprzez analizę danych TAWS/FMS pozyskanych i zarejestrowanych podczas ostatniej minuty lotu samolotu TU-154M z Warszawy do Smoleńska, pokazujemy wartość i ukazujemy możliwości podjęcia prac badawczych nad rozszerzeniem standardowej obecnie funkcjonalności systemów TAWS/FMS tak, by umożliwić ich efektywne wykorzystanie przy badaniu przebiegu i przyczyn wypadków lotniczych. Lot zakończył się całkowitą destrukcją tego samolotu i śmiercią wszystkich pasażerów i członków załogi. Dane TAWS/FMS wysokości lotu oraz czasowo-przestrzenne, tj. położenia geograficznego i prędkości poruszania się samolotu zostały sprawdzone pod względem ich spójności wewnętrznej i zewnętrznej względem danych z rejestratora eksploatacyjnego ATM QAR. Wykorzystując dane ATM QAR, zapisy z rejestratora głosu z kabiny pilotów (CVR) w powiązaniu z danymi z systemów TAWS/FMS dokonano odtworzenia najprawdopodobniejszej trajektorii poziomej i pionowej lotu samolotu TU-154M podczas ostatniej minuty przed jego całkowitym zniszczeniem,...
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engrXiv: "O wartosci i wykorzystaniu danych TAWS/FMS do badania wypadkow lotniczych, sprawa lotu Warszawa-Smolensk, 10 kwietnia 2010 roku" - https://t.co/jFMHORAuUM #engineering
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Authors: 2
Total Words: 0
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2.005 Mikeys
#3. A dynamical multi-input/multi-output network formulation for stability analysis in AC microgrids
Chrysovalantis Spanias, Petros Aristidou, Michalis Michaelides
Nowadays, we have witnessed a significant increase of renewable sources across the existing power grids, as a result of the undeniable need to mitigate the effects of environmental pollution and assist the economic development of countries around the globe. However, due to the lack of rotational inertia and their intermittent nature, renewables have also increased the severity of the occurring disturbances and instability phenomena, which in turn place a demand for more accurate modeling of the network and the power system components. In this paper, we propose a novel network formulation for AC microgrids that allows the consideration of less conservative conditions for the network, while allowing the adoption of higher order inverter-based generation dynamics and facilitating the stability analysis and control. In particular, we formulate the network as a dynamical multi-input/multi-output system, which we show is both stable and passive, even if the network’s dynamic and lossy nature is taken into account. We then briefly...
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engrXiv: "A dynamical multi-input/multi-output network formulation for stability analysis in AC microgrids" - https://t.co/JeVWR5VCn8 #engineering
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Authors: 3
Total Words: 5275
Unqiue Words: 1499

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