Sökning: "Added damping"

Visar resultat 16 - 20 av 34 uppsatser innehållade orden Added damping.

  1. 16. Added Properties in Kaplan Turbine - a preliminary investigation

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Stina Bergström; [2016]
    Nyckelord :Added mass; added damping; fluid-solid interaction; acoustic coupled simulation; two way coupled simulation;

    Sammanfattning : A preliminary investigation of the added properties called added mass, added damping and added stiffness have been performed for a Kaplan turbine. The magnitude of dimensionless numbers have been used in order to classify the interaction of the fluid and the solid. LÄS MER

  3. 17. Modeling and Concept Design of Wave Energy Device

    Master-uppsats, KTH/Marina system

    Författare :Rickard Holmgren; [2016]
    Nyckelord :;

    Sammanfattning : It has been suggested that it is feasible to extract energy from ocean waves which may be used to generate electricity. This thesis is centered on a wave energy converter system, which is known as a point absorber, which in its most simple design may be seen as a buoy moving up and down due to the wave motions. LÄS MER

  4. 18. Influence of Fluid Structure Interaction on a Concrete Dam during Seismic Excitation : -Parametric analyses of an Arch Dam-Reservoir-Foundation system

    Master-uppsats, KTH/Betongbyggnad

    Författare :Rikard Hellgren; [2014]
    Nyckelord :seismic; fluid-structure interaction; arch dam; concrete; finite element analysis; jordbävning; fluid-struktur interaction; valvdamm; betong; finit element analys;

    Sammanfattning : The aim of this study is to investigate how Fluid-Structure interaction is included in numerical earthquake analyses of dams. The base for this project is theme A from the 12th international benchmark workshop on numerical analysis of dams, which was held in October 2013. LÄS MER

  5. 19. Simulation, design and experimental validation of a passive magnetic damper for ultra-fast actuators

    Master-uppsats, KTH/Elektroteknisk teori och konstruktion

    Författare :Chen Chen; [2014]
    Nyckelord :Damping; Thomson actuator; eddy currents; magnets; ferromagnetic materials;

    Sammanfattning : A contact system driven by a high energetic Thomson actuator requires to be decelerated from full speed down to zero. The forces originated from the interaction between a stationary copper tube and a moving array of magnets combined with plastic or ferromagnetic material are used to generate eddy-current damping. LÄS MER

  7. 20. Modelling of Elastic Ship in Waves

    Master-uppsats, KTH/Marina system

    Författare :Manohara Ranganath Draksharam; [2012]
    Nyckelord :;

    Sammanfattning : Ships in the seas undergo different distortions like bending, twisting or combined bending and twisting. The demand for increase in length and speed of the ships is increasing due to this the study for flexibility of structures is becoming important. LÄS MER