Theses (Department of Mechanical Engineering)

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https://hdl.handle.net/2437/360721

Theses collection of the Faculty of Engineering.

Böngészés

Megjelenítve 1 - 20 (Összesen 75)

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Vertical Axis Hybrid Wind Turbine
Hameed, Adeel; Kostyák, Attila; DE--Műszaki Kar
My thesis' main purpose is to look into the potential and practicality of vertical axis hybrid wind turbines (VAHWTs) for sustainable electricity generation and investigate the self-starting issue of VAWT. The development of sustainable energy sources has become increasingly critical in recent years because of growing worries about climate change, finite fossil fuel supplies, and the need for energy sustainability. Wind power stands out as a prominent and realistic alternative among the vast range of renewable energy options and the urgent problems of climate change, energy security, and sustainable development have been identified as ones that require a significant response from renewable energy. This prompted me to focus my thesis on vertical-axis hybrid wind turbines and how the self-starting issue can be tackled to make it more efficient. My research’s main purpose is to investigate the potential and practicality of vertical axis hybrid wind turbines (VAHWTs) for sustainable electricity generation. To begin, I intend to present a detailed overview of wind turbines' original design and development process. Secondly, I would analyze the possible turbine types, VAWT will be compared with HAWT, and the possible conclusions will be written, and the efficiency based on the location and production output will be analyzed. The main steps include investigating the starting process of the wind turbine, solving the starting process problem, analyzing possible turbine types and comparing them with the horizontal axis wind turbine, and analyzing the efficiency of the vertical axis hybrid wind turbine based on location and production output. It is also evident from this study that in an era marked by rising energy demand and an urgent need for long-term solutions, the collaboration of artificial intelligence (AI) and the energy sector shines as a beacon of hope. The investigation of AI's integration in smart grids, energy forecasting, storage systems, predictive maintenance, cybersecurity, and optimized distribution highlights its critical role in reshaping our energy supply system. In conclusion, my investigation sought to pinpoint turbines well-suited for facility-level installation, emphasizing efficiency within specific wind conditions and compatibility with low-altitude sites near facilities. While refinements are possible with additional factors, the current approach is a resource-efficient solution for initial calculations.
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Racing Suspension in Rally Motorsports
Ghanem, Marcel; Menyhárt, József; DE--Műszaki Kar
This thesis was conducted to demonstrate how suspension choices significantly impact the performance outcomes and competitiveness of rally racing cars. The exploration begins with a historical overview of rally racing, tracing its evolution to the present day. The study delves deeply into suspension models, examining both their design and practical aspects. Real-life data from the preparation of a rally car for a world championship race, personally undertaken under the guidance of Motortune Racing's race engineer and team leader, Roger Feghali, using MoTec ECU racing data analyst software on Mitsubishi EVO X Grp.N and Skoda Fabia R5 EVO 2 rally cars, is thoroughly analyzed. The assembly design, computer-generated to illustrate the racing suspension's shock absorber and its components, is included. Additionally, a mathematical model of the racing suspension system is presented, elucidating the various parts and functions of the suspension systems. Rally racing data is then presented to showcase the suspension system's impact on a rally car. MoTec rally data sheets played a pivotal role in the comparative analysis. Drawing on my experience as a support race engineer, examining the data sheets and understanding the suspension setups used led to the outlined results. The study highlights the McPherson strut system as the most suitable foundation for rally motorsports, particularly when paired with high-quality suspension springs and coilovers from manufacturers such as Ohlins' and K&W. In conclusion, this thesis affirms the hypothesis that suspensions play a paramount role in controlling a rally car. However, it also emphasizes the ability of racing manufacturers and teams to amalgamate elements from different suspension systems, maximizing effectiveness by leveraging the unique properties of diverse elements across various systems. Debrecen,
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Geometric notifications and comparative fem analysis for a water pump impeller
Wang, Zhensheng; Bodzás, Sándor; DE--Műszaki Kar
This thesis focuses on the impeller of a certain car water pump as the research object. Based on the measured point data, using the principle of NURBS surface formation, a 3D model of the water pump appliance is created by fitting the point. Based on the 3D CAD model of the water pump impeller, The CNC machining scheme of the water pump impeller is designed, simulating the tool path in the machining process, then obtaining the NC machining code. Based on the existing plate impeller and the design principle of parametric modelling, optimizing the geometric parameters of the existing water pump impeller blades and obtaining two new impeller structures. Using the FEM based on ANSYS software, analysing the strength and characteristics of these three different types of water pump impeller blades. The strength and stiffness of the impeller are researched, and verifying the rationality of the structure. A best comprehensive performance optimal impeller design model is obtained, which was used as a reference for optimization design.
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Hőre lágyuló kompozit féknyereg végeselemes modellezése multiscale anyagmodell segítségével
File, Máté; Huri, Dávid; DE--Műszaki Kar
A dolgozatom során egy termoplasztikus kompozitból készült féknyereg végeselemes modellezését végeztem el, melyet az osztrák Johannes Kepler Universität Linz, Institute of Polymer Product Engineering (JKU IPPE) intézettel közösen dolgoztam ki. A modellezési feladat elvégzéséhez egy anyagi szintű visszafejtő tervezési eljárást dolgoztam ki, multiscale anyagmodellek és az ilyen modellek által nyújtott lehetőségek felhasználásával. A féknyereg alapanyaga egy PPS (polifenilén-szulfid) kompozit véletlenszerű orientációjú karbonszálerősítéssel, a laboratóriumi vizsgálathoz felhasznált próbatestek pedig egyirányú szálerősítésűek voltak. Szobahőmérsékleten és 150 °C-on szakítóvizsgálatokat végeztem különböző orientációkban. A szakítóvizsgálatok elvégzése után mikroszkópos vizsgálat és képelemzés segítségével meghatároztam az alapanyag szál kitöltési tényezőjét. A mért értékek alapján létrehoztam a kiinduló egyirányú szálerősítésű alapanyag multiscale modelljét. A Multiscale Designer szoftver egy optimalizáló eljárás segítségével kiszámította a 0°-os és 90°-os próbatestek által szolgáltatott értékek alapján az alapanyagot felépítő szálerősítés, illetve mátrixanyag mechanikai tulajdonságait. Az így létrejött modellel elvégeztem a 45°-os próbatest végeselemes szimulációját, majd ezt összehasonlítottam a mért értékkel, mely 8%-os relatív hibát mutatott. Ugyanezen eljárást elvégeztem a magasabb hőmérsékletű eredmények esetében is, ebben az esetben magasabb, 24%-os hiba mutatkozott, mivel a modell létrehozásához is a szobahőmérsékleten mért eredményeket használtam fel szálirányban. A szobahőmérsékletű és 150°C-os mechanikai paramétereket felhasználva lineáris interpolációval egy harmadik modellt is létrehoztam a 120°C-os hőmérséklethez. Az anyagmodellek által szolgáltatott mátrix, illetve szálerősítés mechanikai tulajdonságokat ezután bemenő paraméterként használtam egy-egy véletlenszerű rövidszál erősítéshez alkalmazható anyagmodell létrehozásához. A modellekhez a mért szál kitöltési tényezőt használtam fel ebben az esetben is, a véletlenszerű szálerősítést pedig kvázi-izotropként kezeltem. Az így létrehozott anyagmodelleket használtam fel a féknyereg szimulációjához. A féknyereg szimulációjakor az összeszerelés és a maximális féknyomás általi terheléseket vizsgáltam meg. A féknyereg a szimulációk alapján nem felelt meg a támasztott követelményeknek, mivel a 120°C-os és 150°C-os hőmérsékletek esetén a két fél szétnyílásának mértéke meghaladta az 1 mm-t. A nagy mértékű alakváltozás a kapcsolódó alkatrészek károsodását, illetve a fékhatás csökkenését, megszűnését okozhatja. Az alapanyag a szimulációk által szolgáltatott eredmények alapján nem alkalmazható a féknyereg esetében.
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Manufacturing Design and Geometric Analysis of Spline Shafts
Roy, Atosi; Bodzás, Sándor; DE--Műszaki Kar
This thesis investigates the geometric analysis of spline shafts by employing several different methods of analysis, including contact and non-contact methods. An extensive experiment was carried out by employing the contact method of surface analysis or surface roughness analysis by means of a surface roughness profilometer. The purpose of this experiment was to investigate a wide range of factors that are associated with behaviors, including fretting damage, manufacturing precision, and wearing potential. Based on the findings, it was discovered that a number of roughness factors had the ability to offer meaningful insights on possible phenomena. Three-dimensional scanning, which is a non contact method that makes use of modern technology, was also utilized in order to find deviations on the surface between the standard computer-aided design (CAD) model and the shafts that were manufactured using a high precision 3D scanner. I have also developed a manufacturing technique for spline shafts that has the potential to be the best possible one through calculation. This technology fits the criteria of the industrial sector and enables machining that is both fast and efficient.
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NDE and diagnostics of an industrial printer
Zaman, Berkay; Balogh, Gábor; DE--Műszaki Kar
Even though I started my research for my thesis in November 2022, my experience with industrial printers goes much further than that. I have been working on a maintenance team of an industrial printer since June 2022. I am aware of the typical failures and the maintenance procedure of industrial printers. When I was looking for a supervisor for my thesis, Mr Balogh Gabor helped me to utilize my knowledge and experience to the fullest by helping me specify my thesis topic on Heidelberg Speedmaster SM 74. I would like to thank him for helping me on my journey and keeping me excited for my thesis. As I started my research for my thesis, I feel more comfortable working on industrial printers, and I feel much more savant. Although I am very excited to write about diagnostics of industrial printers, I will try to express my words as plainly as possible. I hope this thesis will be able to give readers wisdom about industrial printers, diagnostics equipment, and their utilization. My aim is to determine the condition of the bearings which are providing the smooth rotational movement for the ink rollers. I will also explain printing technologies and SPM method. By the end of this project, we will know the condition of the bearings and the further action about these bearings.
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Shape optimization of a rubber bumper by using Ansys optiSlang
Platonov, Iurii; Huri, Dávid; DE--Műszaki Kar
This thesis aimed to explore the application of optimization algorithms, through the shape optimization of a rubber bumper, a crucial component in automotive engineering. The ever growing complexity of engineering tasks and the demand for efficient solutions motivated me to investigate how artificial intelligence (AI) and machine learning (ML), integrated into various optimization software, can enhance and speed up the design process. Through the analysis of scientific literature dedicated to rubber materials and optiSlang optimization software, various rubber products were introduced, including their properties, usage cases, advantages, disadvantages, structural, production, and simulation-related limitations, additionally, available techniques and algorithms of optiSlang were explained, their applicability in different industries. The optimization process involves specifying the objective function, in our case, a single goal task, depreciation of a relative error function of a reaction force by modifying the inner and outer diameter of a rubber bumper and comparing it with the known optimum. During the next step specimen’s geometry was created and a finite element model was introduced, including the incorporation of constraints, loads, boundary conditions, and meshing. After confirming the mesh integrity and force convergence through different metrics and graphs, sensitivity analysis was performed. The goal was to find the connection between design parameters and the objective function while narrowing down the search space, which helped to evaluate optimal designs quicker during the comparison of optimization algorithms. Throughout testing, discrete inputs were preferred due to cost and manufacturing limitations, yet continuous variable optimization methods were also employed for their precision. While using optimization algorithms for both types of inputs, results indicated that all optimization methods yield reliable outcomes within reasonable computational timeframes, with the power of standard hardware configurations. The findings indicated the importance of selecting appropriate optimization algorithms based on the specific objectives, computational resources availability, and time constraints of the engineering task. The novel One-Click method was also highlighted, showing rapid results generation capabilities and simultaneous comparison of all available optimization algorithms.
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Generative Design Of A Track Control Arm
Nguyen Xuan , Hiep; Mankovits, Tamás; DE--Műszaki Kar
3D modelling, finite element analysis (FEA), and optimization techniques play a crucial role in the field of engineering. Each of these components contributes significantly to the design, analysis, and improvement of various structures and systems therefore enhances human life. The incorporation of these three tools method enables engineers to develop designs that are not only more efficient but also cost-effective. This methodology proves especially beneficial in industries like aerospace, automotive, civil engineering, and mechanical engineering, where intricate structures and systems demand comprehensive analysis and optimization to ensure successful implementation. As an University of Debrecen student studying in mechanical engineering specialization, I primarily decided choose these three combining methods as the main purpose of my thesis project:’ Generative design of track control arm’, component in a vehicle;s suspension system. In the early phase of the task, we will gather necessary resources which is related to a track control arm and 3D modelling software will be used in the thesis. In the first task, with the sketch is given and Solid Edge knowledge, a track control arm is designed. In the second task, the finite element model of the track control arm is established in the software, with the mesh generation and its material. Type of element is selected and boundary conditions and loads are verified. In the third task, by using the Solid Edge simulation, the module is analysed in different situations, the maximum and minimum nodes are reviewed and factors of safety are compared, therefore the range forced on the module is calculated. In the fourth task, the track control arm is optimized by generative design module of Solid Edge, achieved the new design and n, the design, simulation, and optimization process for the track control arm have yielded significant improvements. Through meticulous engineering and analysis, a remarkable 28% reduction in mass has been achieved and a new design released, contributing to enhanced overall vehicle performance and fuel efficiency. The incorporation of advanced simulation tools and optimization techniques has not only lightened the component but also led to the creation of a new, optimized shape. This achievement represents a commendable balance between structural integrity and weight reduction, showcasing the effectiveness of the design approach. The success of this project underscores the importance of employing cutting-edge design and simulation methodologies in the automotive industry. The 28% mass reduction not only aligns with contemporary trends in lightweighting for improved efficiency and sustainability but also positions the track control arm as a competitive component within the automotive market.
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Noise measurements and examination of noise sources in passenger cars
Gawbah, Awadh Mohammed Awadh; Kocsis, Dénes László; DE--Műszaki Kar
This thesis aims to get and measure the noise emitted by the passenger vehicle according to ISO 5128-1980, ISO 5130:2019, and the Soundcam device. The thesis starts with the theoretical background about the sound, human hearing, and the effect of noise on human health. After that, it addresses the different sources to the overall noise of the vehicle that experienced by the occupants, such as engine noise, tire noise, intake and exhaust noise, gearbox noise, and aerodynamics noise. And finally, ISO 5128-1980, ISO 5130:2019 methods, and SVAN 971 Sound level meters and Soundcam 2.0 devices, which are used in the measurements, are explained in details. The vehicle used in this test is MK7 Golf Volkswagen. The practical part of the thesis involves the measurement results at the different microphone positions, and at each vehicle operating conditions, which are the steady speeds, the full throttle acceleration, and the stationary mode inside and outside the vehicle. Then, the L_(AF max) average values are evaluated and compared at each condition, which serves to identify the noise sources and the difference in the results. The highest average value of L_(AF max) at the steady speeds is when the speed of the vehicle reaches 120 km/h, while the lowest value at 60 km/h speed. For the full throttle acceleration condition, the noise level in the driver seat is higher than the noise in the passenger seat. The L_(AF max) average value at stationary mode outside the vehicle is higher than the noise inside, and the driver seat has the lowest value at this measurement. The last part of the results is the Souncam average results, which are high at the front side, and low at the rear of the vehicle. The reasons for the results difference are explained in details in the discussion section. Finally, some solution ways for reducing the noise of the vehicle were introduced, such as using damping materials, the engine insulation, and improve some parts of the vehicle. In summary, this thesis offers significant complexities of vehicle noise, and offering valuable perspectives and solutions to minimize the noise impact on the environment around us.
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Manufacturing design of a helicopter frame
Shudabayev , Aslan; Bodzás, Sándor; DE--Műszaki Kar
This paper suggests the latest manufacturing design approach of a helicopter frame, mainly involving its pattern plane creating, fabric sourcing ratio, blank design continuous layout, as well as pinpointing the pressure center point and tool design. It starts by the creation of a pattern plane where the particular geometry of each frame is specifically identified and optimal material can be identified. It entails doing a detailed research on the material qualifying- characteristics and structure- requirements while making a good use of resources without sacrificing structural integrity. Among the other vital aspects, the material utilization is an important one. The objectives of this stage are the utilization of material in the best way which leads to the waste reduction, even though the requirements need for the product should not be affected. For what now,blank layout can be discussed. On this stage a tangible form of a pattern plane is translated with the resulting piece as underpinnings for a fabrication process of a proposed object. Instead of that, properties of the materials, manufacturing restrictions, and critical parameters are studied for the blank optimizing. Another important design element, where the center point of pressure is determined, is pressure point assembly of the frame for the helicopter. Next off the paper is to design the tooling of the machines used to make the helicopter frame. This in addition to the molding, forming, and assembling of parts using dies, jigs, and fixtures creates long lasting assemblies with less error rates. Overall it can be claimed that this article has given a clear procedure of a helicopter undercarriage design, putting the utilization of material to the highest priority, strengthening structure, and the ability to boost efficiency of production through improved tool design.
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Geometric design, modelling, finite element analysis of bevel gear with a spiral tooth direction
Rahat, MD Monuril Islam; Bodzás, Sándor; DE--Műszaki Kar
This study takes a close look at the geometric design, modeling, and physical analysis of a pair of bevel gears with spiral teeth. The focus is on a single project. It started with a close look at a spiral bevel gear taken from the differential box of a Polski Fiat. Using design software, perfectly designed the gear. Keeping the original parameters from the Polski Fiat gear was key. Paid a ton of attention to this, so the modeling process was accurate and trustworthy. This laid a solid groundwork for the physical analysis which was done afterwards. Crucial to the study was making four distinct gear designs, each with a unique helix angle (25°,30°,35°& 40°). This method made a deep side-by-side comparison possible, looking closely at how changes in the helix angle influence the gear's functionality under simulated scenarios. Ansys was used for static structural analysis, and each model faced a variety of trials with differing moment loads. The emphasis was on important measures like total deformation, directional deformation, equivalent stress, and normal stress. This study's results gave useful understanding about how each gear type behaves under various situations. It uncovered important information on how helix angles impact and how well the gear works. Especially looking at how stress is spread around the gear and how the gear changes shape. These findings were correct and could be used accurately by comparing them to theory and well-known gear standards
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Application of AI in Autonomous Vehicles
Naat, Yacine; Menyhárt , József; DE--Műszaki Kar
This thesis is about the innovation of the various Application of AI in Autonomous Vehicles with a focus on the lane detection technology. Investigating the crucial task of precisely identifying and tracking lane boundaries, which is essential to facilitate secure and efficient self-driving navigation. This study comprises a thorough examination of existing literature related to algorithms used in detecting lanes with particular emphasis on computer vision and machine learning methods. The research, via experimental analyses evaluates the state-of-the-art algorithms' performance under diverse real-lifelike scenarios in virtual or simulated eviroment. Through the use of simulations, the thesis aims to evaluate how lane detection python algorithms utilising machine learning libraries respond to different conditions and road layouts and how modern machine learning models and AI trends can be harvested in the automotive industry. The research involves the use of a simulated environments mimicking real-world conditions, allowing for controlled experimentation and analysis. The challenges of real-world deployment occlusions, dynamic road conditions and diverse lane markings types are emphasised. The thesis also investigates how dependable can lane detection algorithms be, by monitoring the accuracy and error margin values with each training and observing the simulated car behaviour. Acknowledging a crucial need for robustness and versatility within autonomous navigation systems is given special attention in this thesis. Additionally, the thesis discussed the advantages and limitations of using simulated environments for testing and validating lane detection algorithms compared to real-world testing. Consideration of ethical and safety implications in the transition from simulation to real-world deployment were taken into consideration. In conclusion, the thesis end result showed a high-accuracy prediction of the lane detection developed for this project within the simulated environment, offering valuable information for researchers and developers working on autonomous vehicle systems. The findings contribute to the understanding of how well these algorithms perform in controlled, virtual settings, aiding in the refinement and optimization of lane detection systems for future real-world applications.
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Integration of Hydrogen Fuel Cell Vehicles into Infrastructure
Kurmantas, Adil; Menyhárt, József; DE--Műszaki Kar
Incorporating hydrogen fuel cell vehicles (HFCVs) into the transportation infrastructure has the potential to bring about a revolutionary transformation in the global mobility landscape. This analysis delves into the state of HFCV infrastructure, market dynamics and growth prospects uncovering how HFCVs could be game changers in the international transportation industry. One of the attractions of HFCVs is their ability to tackle environmental challenges posed by traditional fossil fuel powered vehicles. By utilizing efficient energy through hydrogen fuel cells HFCVs not only address climate concerns but also pave the way for sustainable development in the transportation sector. While there is optimism surrounding HFCVs it is important to maintain a balanced perspective. A thorough Failure Modes and Effects Analysis (FMEA) reveals that currently risks associated with integrating HFCVs are minimal. These risks encompass aspects such as infrastructure and economics emphasizing the need for a cautious approach to ensure a smooth transition. To overcome these challenges and minimize setbacks, effective collaboration between governments and industry stakeholders is crucial. Continuous support and cooperation from entities play a pivotal role in successfully integrating HFCVs into everyday transportation systems. The next decade to fifteen years will be pivotal in shaping the future of HFCVs in transportation. Ongoing efforts to improve infrastructure, technological advancements and market expansion hold potential, for bringing about substantial changes worldwide. With the unwavering commitments of both governments and companies these joint efforts hold the potential to bring forth advantages leading us towards a future, in transportation that is more environmentally friendly and sustainable.
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Health monitoring of Electric Vehicle
Satkali, Alibi; Menyhárt, József; DE--Műszaki Kar
This work investigates critical aspects of lithium-ion battery technology in electric vehicles (EVs), focusing on thermal management and novel charging solutions. Electric Vehicle market getting popular day by day; Countries as China, Germany, and USA. The parts difference, as AC/DC converter and engine, etc. Lithium-ion batteries offer high energy density but require precise temperature control for optimal performance and safety. The study explores various thermal management methods, including air cooling, liquid cooling, and phase change material systems. Simulation scenarios, such as nail penetration-induced damage, are analyzed, and an integrated cooling system is proposed for monitoring temperature profiles. The main problem now days is charging station numbers. To increase the number of car that charging in one moment, proposed charging method by Tesla’s coil and Tesla’s car bases. A SWOT analysis evaluates the coil charger, highlighting strengths, weaknesses, opportunities, and potential threats. Practical solutions and models from existing studies contribute valuable insights into the field. The findings underscore the importance of effective thermal management for lithium-ion batteries and propose a forward-looking charging solution to address the growing demands of the electric vehicle industry. Further research and development are recommended for the successful implementation of these advancements.
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Generative design of a jet engine bracket using solidedge
Azeez, Rahman; Mankovits, Tamás; DE--Műszaki Kar
This thesis investigates the application of generative design techniques in the field of jet engine bracket design using Solid Edge software. The project, especially emphasizes the use of computational methods towards structural optimization, aims to add to the growing environment of the aerospace field by using new design technology. The investigation starts with an in-depth review of generative design principles and their application inside the Solid Edge software. The study explores into the generation of different design iterations using an iterative approach, considering different kinds of parameters such as material properties, geometric limitations, and performance measurements. The optimization techniques included into Solid Edge are used systematically to repeatedly develop designs, with an emphasis on improving structural integrity, minimizing weight, and optimizing load distribution. Structural simulations are carried out to evaluate the structural performance of produced designs under 4 of load scenarios, making sure that they meet 3D printing standards and safety requirements. At the same time, an analysis on the aesthetic and practical constraints associated in the generative design process is provided, acknowledging the close connection between imaginative perception and engineering precision. Following the guidelines set out by academic articles and journals, the thesis compares jet engine brackets that are constructed conventionally with those that are created generatively. Comparative analyses include structural integrity, weight efficiency, and versatility, giving practical insights into the importance of generative design approaches in the aerospace sector and engineering field. The thesis concludes with views on the potential benefits of generative design for the future of aerospace engineering, emphasizing the importance ofmaterials scientists for material selection, and manufacturing experts. As a result, the thesis emphasizes within the field of study as a thoughtful investigation of generative design applied to the important field of jet engine brackets, giving important details and methods to advance the continuous progress of aerospace and mechanical engineering practices.
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Development and optimization of a prosthetic hand: design, control and functional evaluation
Abdelaal, Serag Abdelnasser Sayed; Almusawi, Husam Abdulkareem; DE--Műszaki Kar
The complexities of mechanical design in the development of a prosthetic hand are thoroughly examined in this thesis. The index finger is used as a standard to emphasize the standardization of finger design. Thorough Finite Element Analysis (FEA) is carried out to guarantee the prosthetic hand's robustness to varying loads. After that, the finger is subjected to a thorough kinematic analysis that treats it as a dual 4-bar mechanism and offers a complete understanding into its dynamic behaviour, velocity, and location over time. The assembly procedure is analysed in detail together with material selection criteria that prioritize PLA to highlight the strength and practicality of the mechanical design. The investigation additionally extends its scope to include sensors and a control system, with servomotors and electromyographic (EMG) signals being the main type of integration. The functionality of the prosthetic hand is improved by the ensuing integration. Thorough validation using SimScape Multibody produces outcomes that confirm the system's correct operation and careful attention to its mechanical components.
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Investigate the fatigue life of the PWR nuclear reactor vessel
Kalthoum, Mhd Wafik; Huri, Dávid; DE--Műszaki Kar
International design regulations can be used to test and design a reactor pressure vessel. These codes give engineers proactive steps that can be taken to prevent any major catastrophes. Through the use of the ANSYS finite element program, this project examines the efficacy of the elastic-plastic limit based design approaches of the primary International Design Codes (ASME and BS). For the analysis, a standard pressurized water reactor (PWR) with a 300 MW capacity was chosen. SA-508 Gr.3 Cl.1, a nuclear grade steel, was utilized as the RPV material in the comparison. It has been determined that the design by analysis approach can be utilized to eliminate the needless caution that results from using the design by rule approach, which is covered in BS-5500 section 3. This study suggests that by applying the design by analysis approach as outlined in the ASME code, the maximum allowed pressure of the RPV may be increased by up to 26.37%.
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The Noise emission analysis of internal combustion engine and electric motor vehicles
Khurram, Muhammad Haseeb; Kocsis, Dénes László; DE--Műszaki Kar
The transition from internal combustion engine (ICE) vehicles to electric vehicles (EVs) is often brought up in relation to the advantages of emissions reduction for the environment. However, the acoustic environmental impact, particularly the noise emission characteristics of these vehicles, is a subject that needs comprehensive study. This thesis provides an in-depth analysis of noise emissions from both ICE vehicles and EVs, aiming to elucidate their noise profiles and the implications for urban noise pollution. The research methodology involved a series of controlled experiments using the SoundCam 2.0 device to capture and analyze the noise levels of a 2017 MK7 Volkswagen Golf representing ICE vehicles and a 2020 Volkswagen e-Up for EVs. Measurements were conducted across six different scenarios, including stationary baseline noise levels, full throttle acceleration, and pass-by noise at varying speeds, to simulate real-world driving conditions. Initial findings indicate that at lower speeds, EVs exhibit significantly lower noise levels compared to their ICE counterparts, primarily due to the absence of engine noise. This suggests that EVs could play a crucial role in reducing noise pollution in urban environments, where lower speeds are common, and noise pollution is a significant concern for public health and well-being. However, the research also uncovered that the noise level difference between ICE vehicles and EVs diminishes as vehicle speed increases. At higher speeds, non-propulsion-related noises such as tire-road interaction and aerodynamic effects become more pronounced, leading to a convergence of noise levels between the two vehicle types. This phenomenon highlights the complex nature of automotive noise sources and underscores the need for a diverse approach to noise reduction that goes beyond the powertrain. The thesis further explores the potential environmental health benefits of widespread EV adoption, considering the lower noise levels at typical city driving speeds. It also discusses the challenges and opportunities for noise reduction technologies, emphasizing the importance of addressing aerodynamic and tire-related noise, especially as the automotive industry continues to evolve towards electric mobility. In conclusion, this thesis provides valuable insights into the comparative noise emissions of ICE vehicles and EVs, offering a subtle understanding of their environmental impact. The findings advocate for the integration of noise reduction strategies in vehicle design and urban planning, reinforcing the role of EVs in creating quieter, healthier cities. Future research directions are proposed, focusing on the development of innovative noise control technologies and the establishment of new urban design principles that consider the acoustic environment as a critical component of urban liveability.
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Design and Analysis of a Solar Powered Car, Optimising for Sustainable Mobility
Essil, Desmond Armoh Annan; Menyhárt, József; DE--Műszaki Kar
The escalating global demand for green energy solutions has moved solar-powered vehicles into the spotlight as a promising avenue for reducing carbon emissions and mitigating environmental impact. This thesis investigates sustainable transportation, with a primary focus on the design and analysis of a solar-powered car. The study delves into the complex interrelation of automotive design principles, solar technology integration, and spatial optimization on the car body. The research journey encompasses four primary tasks. Drawing inspiration from leading solar-powered models such as Stella Terra and Lightyear One, the first task of this study builds an innovative design that seamlessly incorporate solar panels into the car's form without compromising aesthetics, aerodynamics, or functionality. To validate the design's efficiency, Solidworks Flow Simulation was employed for CFD analysis to evaluate the efficiency and viability of the car body. Aerodynamic factors are all examined to strike a balance between reduced drag and enhanced solar exposure. The CFD analysis not only validated the design but also informed iterative improvements. The third task delved into the integration of solar panels without compromising aerodynamics. Through meticulous consideration of panel placement and orientation, arrays are feased to strike a harmonious balance between solar energy harvesting and aerodynamic efficiency. The final task leveraged Simulink to model and simulate the solar energy collection and conversion process. The simulation showcased how energy harvested from the solar panels on the car's roof was efficiently converted and stored in the battery packs of the car. Though not modelled in detail, the prototype exibited very low drag and reduced pressure clouds around many vantage points during the simulation, which speaks to an Optimized Solar Car Prototype. The Simulink simulations also revealed how increased panel area on the body of the car proportionally affects the energy generated. Beyond the technical aspects, this thesis also raises awareness and interest in sustainable transportation solutions. The integration of solar power into everyday vehicles could inspire discussions on cleaner energy sources and influence public perceptions of eco-friendly mobility. Environmentally clean, socially equitable, affordable, economically viable, efficient and safe mobility is only possible through cooperation among the govemment as well as businesses and individuals.
Korlátozottan hozzáférhető
Design and Analysis of belt conveyor using Finite element method
Kinyua, Lynn Wanjiku; Hajdu, Sándor; DE--Műszaki Kar
Finite element method and CAD are popular techniques that support and streamline a number of construction and simulation-related tasks. A scenario where these techniques are utilized, engineers and companies benefit from savings in terms of costs, time, and resources when this software is used. This thesis finite element approach has been utilized in design and analysis. A conveyor belt system is designed and a roller is analysed using the SolidEdge software. As the solid edge software is used for both the assembly and modeling process of the part, it is simpler to modify the model as it is being designed to match the intended size and to identify any compromises that may need to be made in order to obtain the most precise and optimum design. SolidEdge has a simple to use FEM program that facilitates analysis. It provides simulations with meshes ranging from coarse to fine, enabling accurate depiction of the forces operating on it. The simulation module makes it possible to perform analysis and prediction in order to identify the maximum projected stress that can be applied on the roller and put to use in the implementation. The roller displacement can also be observed upon implication of the force. In addition to, factor of safety of the roller can be determined once the analysis is done. The factor of safety is used to determine how much load the roller can withhold before it deforms.

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