Keresés
Keresési eredmények
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Simulation of an Operating Machine in Dust Chamber
266-275Megtekintések száma:96Auxiliary equipment used in the automotive industry, such as generator, air conditioner, or starter, is often exposed to harsh conditions, for example splash water, frost, or serious dust load. Therefore, these auxiliary devices are intended to be prepared by the manufacturers to these conditions. The topic of this paper is a part of the analysis of the dust control of generators, which in principle is no different from the examination of other equipment. The flow around the generator and in the dust chamber was simulated by Ansys FLUENT.
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Topology Optimization of Acetabular Cup by Finite Element Simulation
22-34Megtekintések száma:418Hip replacements typically consist of a four-part piece. Our research will focus primarily on the acetabular component. Several different types of materials can be used when creating a hip replacement implant ranging from plastic to titanium. Different materials are used to accommodate for allergic reactions or circumventing potential health risks. Aside from the material, the size of the components plays a factor in terms of durability; a larger diameter head might avoid dislodgement though it could increase wear and tear on the stems through constant friction. A patient’s force applied to the hip replacement is usually measured through a number of physical assessments. Finite element analysis (FEA), a computer-based method of data observation, allows for us to accurately simulate hip forces and their impact on the hip replacements. Through this, it becomes easier to predict and calculate the performance of specific designs. Generative systems can also be used to support performance analysis and optimization through assessing a multitude of cases, many of which apply in real-world scenarios. By applying both systems, we designed and modeled an acetabular cup that when measured decreased the mass from 129 grams initially down to 52 grams, a 60% decrease in total mass. Furthermore, the design we created lessened the trauma on the piece through distributing force across the entirety of the piece rather than specific segments only. This shows an increased durability and life expectancy when compared to usual acetabular cups.
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Egyenes esztergakés élgeometriájának tervezése, modellezése és vizsgálata
11-16.Megtekintések száma:124A publikációban az egyenes esztergakés élgeometriájának és modelljének a létrehozását valósítjuk meg szoftver segítségével a modelltérben. Célunk egy olyan program létrehozása, amely néhány hossz- és szögméret megadásával kiszámítja az annak megfelelő élgeometriát. Ezt drótváz modellként alkotja meg egy olyan fájlformátumban, ami könnyen átvihető a ma használatos CAD szoftverekbe, így ott az esetleges további változtatásokat végre lehet hajtani. Végeselemes-szimuláció segítségével adott technológiai paraméterek és anyagminőség mellett meghatározható egy optimális élgeometria a lehető legjobb forgácsolási viszonyok elérésének érdekében.
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Numerical Model Analysis of Myring–Savonius wind turbines
180-185Megtekintések száma:172Nowadays the importance of renewable energy is growing, and the utilization of the low wind energy potential is getting crucial. There are turbines with low and high tip speed ratio. Turbines with low tip speed ratio such as the Savonius wind turbine can generate adequate amount of torque at low wind velocities. These types of turbines are also called drag machines. The geometry of the blade can greatly influence the efficiency of the device. With Computational Fluid Dynamics (CFD) method, several optimizations can be done before the production. In our paper the Savonius wind turbine blade geometry was based on the so-called Myring equation. The primary objective of this paper was to increase the power coefficient by modelling the effect of the wind on the turbine blade. For the sake of simplicity, a 2D cross-sectional area was investigated in the simulation with ANSYS CFX 19.1.
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Fémhabok képi elemzése és geometriai modellezése
89-92Megtekintések száma:101A mérnöki kutatások egyik nagy kihívása a mára már széles körben alkalmazott fémhabok geometriai
modellezése, valamint a megalkotott 3D-s modell numerikus szilárdságtani vizsgálata. A fémhab struktúrája
meglehetősen bonyolult, így a valóságot jól megközelítő CAD modell előállítása önmagában is komoly mérnöki
feladat, annak adott terhelésre történő végeselemes szimulációja pedig a kutatások középpontjában áll. A projekt
ezen részének célja az előzőekben tárgyalt témakörökre vonatkozó nemzetközi szakirodalom kritikai elemzése és az
eredmények adaptálási lehetőségei, továbbá egy térfogatelemzési eljárás bemutatása a fémhab celláival
kapcsolatban. -
Local Annealing of Cold Rolled Aluminum Sheets by LASER Treatment
21-26Megtekintések száma:120LASER treatment widely used in material processing technologies. The annealing is not the typical application of the LASER treatment, but this is possible to apply in case of cold deformed metals. In the article a cold rolled EN AW 8006 aluminum sheet is annealed by LASER treatment. The microstructure of the annealed sheets is observed by optical microscopy. An existing cellular automata simulation of recrystallization process is modified to study the LASER annealing. The observed microstructure and the simulated results are compared to determine the further development of the developed automaton.
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Review on Construction Procedures of Driving Cycles
266-285Megtekintések száma:278The goal of this paper is to give an overview of the literature of construction techniques of driving cycles. Our motivation for the overview is the future goal of constructing our own driving cycles for various types of vehicles and routes. This activity is part of a larger project focusing on determination of fuel and energy consumption by dynamic simulation of vehicles. Accordingly, the papers dealing with sample route determination, data collection and processing, driving cycle construction procedures, statistical evaluation of data are in our focus.
