Sökning: "resonance frequencies"

Visar resultat 26 - 30 av 84 uppsatser innehållade orden resonance frequencies.

  1. 26. Temperature Control of Induction Heating Using a Multi Coil Solution

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Institutionen för reglerteknik

    Författare :Elias Watsfeldt; Andreas Åsljung; [2020]
    Nyckelord :Technology and Engineering;

    Sammanfattning : In induction heating processes with complex workpiece geometries or stringent requirements, more than one induction coil is usually needed to obtain acceptable results. One objective could be to achieve uniform heating, with minimal temperature variations throughout the workpiece. LÄS MER

  3. 27. Implementation of Collisions in FEMIC for Modelling of the RF Heating with a Lower Hybrid Resonance

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

    Författare :Léo Belleil; [2020]
    Nyckelord :;

    Sammanfattning : Fusion energy is a potential sustainable solution to provide clean energy for the human society. The fusion reaction requires that the ionised fuel (plasma) is heated to extreme temperatures. Magnetic confinement is used to keep the plasma away from the wall and the components mounted on it. LÄS MER

  4. 28. FEM modelling of sound reduction index in partition CLT wall

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

    Författare :Adam Hultin; Erik Hörström; [2020]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Constructing buildings with wood brings many advantages, especially regarding environmental aspects, which has brought an up-rise in these types of structures. However, one of the main issues regarding wooden structures is its tendency to perform poorly acoustically in lower frequencies compared to heavier structures. LÄS MER

  5. 29. A 3D sliding bearing finite element based on the Bouc-Wen model : Implementation in Abaqus

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Rémi Lantoine; [2020]
    Nyckelord :Railway bridge; dynamics; resonance; sliding bridge bearings; finite element; Abaqus; friction; steel; Teflon; PTFE; Bouc-Wen model; friction coefficient; temperature; heating;

    Sammanfattning : As rail transportation is significantly more virtuous than airplanes or cars in terms of greenhousegases emissions, its development is being encouraged in several European countries, includingSweden. In addition, the development of railway lines on which trains can travel at higher speeds ismade in Sweden with the integration of existing infrastructure. LÄS MER

  7. 30. Acoustic Characterization of the Frequency-Dependent Attenuation Profile of Cellulose Stabilized Perfluorocarbon Droplets

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Lisa Saljén; [2020]
    Nyckelord :Ultrasound; Contrast Agent; Attenuation; Acoustic Characterization; Non Destructive Evaluation; Perfluorocarbon; Droplet; Cellulose; Oscillation; Acoustic Droplet Vaporization;

    Sammanfattning : The use of ultrasound contrast agents increases the information available for reconstruction during ultrasound imaging. Previously studied microbubbles, consisting of a gas core, are subject to limitations such as a short lifetime and a large size. LÄS MER