Sökning: "struts"

Visar resultat 1 - 5 av 13 avhandlingar innehållade ordet struts.

  1. 1. Nonlinear micromechanics of open-cell cellular solids

    Författare :Per Hård af Segerstad; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; FEM; Finite strains; Foams; Micropolar theory; Constitutive modelling;

    Sammanfattning : An approach for modelling the response of open-cell cellular solids at finite strainsis developed. The model framework comprises a mechanistic formulation wherethe cellular solid is considered as a network of struts, each connecting two vertexpoints. LÄS MER

  2. 2. Analytical and Parametric Study of Damped Vibrations in Gough-Stewart Platforms

    Författare :Behrouz Afzali Far; Lund University.; Lunds universitet.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This work establishes a comprehensive and fully parametric model for the damped vibrations of Gough-Stewart Platforms (GSPs) at symmetric configurations. It is noteworthy that in the literature a complete solution to this problem has not been presented. This work has been carried out in three stages which are the subjects of Papers I, II and III. LÄS MER

  3. 3. Fluid mechanical simulations and development for vertical axis turbines

    Detta är en avhandling från Uppsala : Institutionen för teknikvetenskaper, Uppsala universitet

    Författare :Anders Goude; Uppsala universitet.; [2011]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The aerodynamics of vertical axis turbines is typically studied using streamtube, vortex or CFD models. This thesis focuses on the first two models, which are the computationally faster ones. LÄS MER

  4. 4. A new perspective on avian phylogeny - a study based on mitochondrial genomes

    Detta är en avhandling från Department of Genetics, Lund University

    Författare :Anna Bartosch-Härlid; Lund University.; Lunds universitet.; [1999]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Genetics; thyroid; neoteni; mitochondrial DNA; phylogeny; Class Aves; Palaeognathae; cytogenetics; Genetik; cytogenetik;

    Sammanfattning : The Class Aves (birds) is generally divided into two main groups - the Palaeognathae and the Neognathae. Paleognathous birds are the flightless ratites and the tinamous, while Neognathae include all other extant birds (more than 9,000 species). LÄS MER

  5. 5. Fluid Mechanics of Vertical Axis Turbines Simulations and Model Development

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Anders Goude; Uppsala universitet.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wind power; Marine current power; Vertical axis turbine; Wind farm; Channel flow; Simulations; Vortex model; Streamtube model; Control system; Graphics processing unit; CUDA; Fast multipole method; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : Two computationally fast fluid mechanical models for vertical axis turbines are the streamtube and the vortex model. The streamtube model is the fastest, allowing three-dimensional modeling of the turbine, but lacks a proper time-dependent description of the flow through the turbine. LÄS MER