Sökning: "Seakeeping"

Visar resultat 1 - 5 av 7 uppsatser innehållade ordet Seakeeping.

  1. 1. Transient Stress and Strain Assessment of Marine Boiler : Fully Rigid Body Dynamics Coupled Finite Element Analyses

    Magister-uppsats, Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Författare :Sohail Anwar; [2020]
    Nyckelord :Seakeeping; FEA; Strain; Stress; RAO; Rigid; Body; Dynamics; Finite; Element;

    Sammanfattning : Operationally, marine components and structures such as boiler in a Ship, are exposed to varying mechanically and thermally induced forces. High-frequency mechanical loading arises from the cyclic pressure, temperature transients, and six directional Rapid Amplitude Operator (RAOs). LÄS MER

  3. 2. Efficient seakeeping performance predictions with CFD

    Master-uppsats, KTH/Marina system

    Författare :Benjamin Lagemann; [2019]
    Nyckelord :added wave resistance; CFD; Courant-adapted time step; Euler ˛flow; FINE Marine; inviscid flow; k-ω SST-Menter; KVLCC2; RANS; regular waves; seakeeping; sub-cycling acceleration; time discretization; viscous flow;

    Sammanfattning : With steadily increasing computational power, computational fluid dynamics (CFD) can be applied to unsteady problems such as seakeeping simulations. Therefore, a good balance between accuracy and computational speed is required. LÄS MER

  4. 3. Parametric Hull Form Variation and Assessment of Seakeeping Performance

    Master-uppsats, KTH/Marina system

    Författare :Aina Pons Roser; [2018]
    Nyckelord :;

    Sammanfattning : This Master Thesis is about the assessment of the seakeeping performance of different ships subjected to hull parametric variations. The latest version of the potential flow CFD software Shipflow in combination with a CAD platform (CAESES) have been used to carry out the evaluations. LÄS MER

  5. 4. Application of the open sourcecode Nemoh for modelling ofadded mass and damping in shipmotion simulations

    Master-uppsats, KTH/Marina system

    Författare :Emil Andersson; [2018]
    Nyckelord :;

    Sammanfattning : Two different numerical tools were considered, the first one is a seakeeping method developed by KTH Ship Dynamics Research Program. It utilizes strip theory and Lewis forms and is further addressed as SMS. LÄS MER

  7. 5. Seakeeping enhancement bylengthening a ship

    Master-uppsats, KTH/Marina system

    Författare :Remi Claudel; [2018]
    Nyckelord :;

    Sammanfattning : In this study, a tentative assessment of a passive solution for pitch decrease, namely the increase in length of the studied ship, is made. The hull form of the lengthened version of the ship is derived from the reference hull form after utilization of Lackenby’s sectional area curve transformation through a prismatic coefficient change (Reference [3]), and utilization of a sectional area curve “swinging” induced by a change of longitudinal position of the centre of buoyancy. LÄS MER