Sökning: "dynamical instabilities"

Hittade 4 uppsatser innehållade orden dynamical instabilities.

  1. 1. Mean Motion Resonances and Planetary Scattering

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Författare :Erik Dahlöf; [2018]
    Nyckelord :mean motion resonance; orbit resonance; planetary dynamics; planet-planet scattering; planetary scattering; eccentricity; inclination; planet systems; disturbing force; orbit dynamics; orbital elements; planets; exoplanets; scattering phase; relaxation; dynamical instabilities; N-body; protoplanetary disk; planet migration; eccentricity damping; inclination damping; planet-disk interactions; Physics and Astronomy;

    Sammanfattning : The observed distribution of giant exoplanet eccentricities and inclinations are significantly larger than what is measured for their Solar system analogues, Jupiter and Saturn. Since the first observations of exoplanets, planet-planet scattering has been proposed as a possible mechanism for exciting the eccentricities and inclinations of giant exoplanets. LÄS MER

  3. 2. Investigating methods for identifying paleo surge-type glaciers or highly dynamical ice flows in Trygghamn, west Spitsbergen

    Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

    Författare :Åsa Wallin; [2016]
    Nyckelord :;

    Sammanfattning : Surge-type glaciers exhibit a cyclic behaviour with an ice mass increase in the reservoir area during the inactive, quiescent phase and a rapid transportation of ice during the active, surge phase. In order to interpret the effects of climate change correctly it is important to distinguish between advances of surge-type glaciers and those of ‘normal’ glaciers, caused by climatic fluctuations. LÄS MER

  4. 3. An Algorithm for Structural Topology Optimization of Multibody Systems

    Master-uppsats, Lunds universitet/Matematik LTH

    Författare :Toheed Ghandriz; [2014]
    Nyckelord :Dymola; Abaqus; TOSCA; nonlinear Differential Algebraic Equation; finite element method; flexible body; SIMP; dynamic body; Topology Optimization of Multibody Systems; flying element; Technology and Engineering;

    Sammanfattning : Topology Optimization (TO) of static structures with fixed loading is a very interesting topic in structural mechanics that has found many applications in industrial design tasks. The extension of the theory to dynamic loading for designing a Multibody System (MBS) with bodies which are lighter and stronger can be of high interest. LÄS MER

  5. 4. Ice condensation as a planet formation mechanism

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Författare :Katrin Ros; [2012]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : In models of dust growth in protoplanetary discs focus is typically on coagulation, a mechanism which unfortunately seems incapable of forming particles larger than centimeters. The main reasons for this are that collisions between larger particles lead to bouncing or fragmentation rather than sticking, and that particles approaching meter-sizes drift radially inwards in the disc due to interaction with the surrounding gas. LÄS MER