Sökning: "teknikvetenskap teknisk mekanik"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden teknikvetenskap teknisk mekanik.

  1. 1. Coupled vibrations in horizontal and vertical rotor-bearings systems

    Författare :Jean-Claude Luneno; Magnus Karlberg; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Technology - Engineering mechanics; Teknikvetenskap - Teknisk mekanik; Hållfasthetslära; Solid Mechanics;

    Sammanfattning : For dynamical systems having several degrees of freedom, motion in one direction can induce motion in the other and/or vice versa. This means that there is a certain coupling between these two motions. Coupling can in some cases be a source of instability that causes self-excited vibrations in rotating machinery. LÄS MER

  3. 2. Classification of different types of snow using spectral and angular imaging

    Författare :Lavan Kumar Eppanapelli; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Experimental Mechanics; Experimentell mekanik;

    Sammanfattning : The current thesis work details a non-contact detection approach concerningclassification of snow with different physical properties such as grain size, densityand specific surface area (SSA). In this approach, reflected light from snowsurfaces is measured as a function of wavelength and viewing geometry. LÄS MER

  4. 3. Optical Measurements of Rolling Friction Coefficients

    Författare :Yiling Li; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Experimental Mechanics; Experimentell mekanik;

    Sammanfattning : This thesis presents an optical method to measure the rolling friction coefficientsfor balls rolling freely on a cylindrical surface. Two different models of a ball rollingfreely on a cylindrical surface are established, one is an analytical model and the otheris a numerical model derived from Lagrange equation. LÄS MER

  5. 4. Experimental and numerical studies of nonsmooth mechanical systems : applications of dimension estimation

    Författare :Johan Eriksson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Technology; nonlinear dynamics; monsmooth dynamics; discontinnities; friction; impact; TEKNIKVETENSKAP; Engineering mechanics; Teknisk mekanik;

    Sammanfattning : .... LÄS MER

  7. 5. Streak breakdown and transition control in wall-bounded flows

    Författare :Fredrik Lundell; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fluid mechanics; active control; laminar-turbulent transition; freestream turbulence; Engineering mechanics; Teknisk mekanik; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : .... LÄS MER