Sökning: "eigenmode"

Visar resultat 1 - 5 av 10 uppsatser innehållade ordet eigenmode.

  1. 1. Comparison of RF Heating in ASDEX Upgrade and ITER

    Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Axel Blennå; Mark Kalldas; [2022]
    Nyckelord :Fusion; ASDEX Upgrade; ITER; FEMIC; ICRH; eigenmode; beam; wave absorption;

    Sammanfattning : The increased effects of global warming have been a driving force to further research and develop sustainable energy sources, such as fusion. In this study, two different fusion devices are compared in terms of ion cyclotron resonance heating (ICRH)of plasma. The two devices are the tokamaks ASDEX Upgrade and not yet built ITER. LÄS MER

  3. 2. Computationally Efficient Methods in Topology Optimization

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Hållfasthetslära; Lunds universitet/Institutionen för byggvetenskaper

    Författare :Vilmer Dahlberg; [2022]
    Nyckelord :Topology Optimization; Eigenfrequency; Eigenmode; Reduced Order Model; Sensitivity Analysis; Deflation; Technology and Engineering;

    Sammanfattning : In topology optimization, iterative, gradient-based methods are used to find the material distribution of structures which maximizes some objective function, typically the structures' stiffness, or in some cases the fundamental frequency. Finite element analysis is used to compute the structural response in each iteration, leading to large systems of equations. LÄS MER

  4. 3. Simulation and Modelling of Injection Molded Components : Fiber Reinforced Polymers in Powertrain Mounts

    Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Hanna Jakobsson; [2020]
    Nyckelord :Material modelling; polymer composites; FRP; orthotropic; powertrain mount; vehicle engineering; Digimat; Material modellering; polymera kompositer; ortotropisk; motorupphängnig; Digimat;

    Sammanfattning : Powertrain mounts' purpose is to mount the engine and the gearbox in the car. Besides that, it isolate the body from the powertrain movements and road excitation. The most common material in powertrain mounts bracket is aluminum but lately, fibre reinforced polymer (FRP) has been acting as a substitute for the aluminum. LÄS MER

  5. 4. Application of Twist Symmetry to a Cylindrical Dielectric Waveguide

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Kwinten Van Gassen; [2020]
    Nyckelord :;

    Sammanfattning : The application of higher order symmetry to waveguide design is an active field and is showing evidence of improvement over traditional waveguide designs. There are two forms of higher symmetry: glide symmetry and twist symmetry. LÄS MER

  7. 5. Dynamic Analysis of Portal Frame Railway Bridges - Case Studies Investigating the Structural Response

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Avdelningen för Konstruktionsteknik; Lunds universitet/Institutionen för bygg- och miljöteknologi

    Författare :Benjamin Berg; Pontus Nyberg; [2020]
    Nyckelord :Dynamic Analysis; Portal Frame Bridges; High Speed Trains; Railway Bridges; Finite Element; Resonance; Modal Analysis; BRIGADE Plus; Technology and Engineering;

    Sammanfattning : As the world continues to see an increase in carbon dioxide emissions, actions aiming towards reducing man's negative impact on the environment are paramount. To be able to compete with the air travel industry, the Swedish Transport Administration suggests a vast expansion of the existing railway system. LÄS MER