Sökning: "gravity modellen"

Visar resultat 1 - 5 av 21 uppsatser innehållade orden gravity modellen.

  1. 1. Gravity water waves over constant vorticity flows: from laminar flows to touching waves

    Master-uppsats, Lunds universitet/Matematik (naturvetenskapliga fakulteten); Lunds universitet/Matematikcentrum

    Författare :Francisco Gonçalves Jorge Dias de Carvalho; [2023]
    Nyckelord :Partial differential equations; Water waves; Euler equations; Free boundary problem; Bifurcation theory; Nonlinear functional analysis; Hilbert transform; Mathematics and Statistics;

    Sammanfattning : In a recent paper, Hur and Wheeler proved the existence of periodic steady water waves over an infinitely deep, two-dimensional and constant vorticity flow and subject to gravity whose profile overhangs, among which, waves whose surface touches at a point, enclosing a bubble of air. We take this further, proving the existence of a continuous curve of water waves from a laminar flow up to a touching wave for fixed non-zero gravity. LÄS MER

  3. 2. Multibody modelling of the vibrations in an aircraft engine

    Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Författare :Charly Mollet; [2022]
    Nyckelord :Vibrations; Multibody Modelling; Rolling Bearings; Rotor Dynamics; Reduction Processes; Vibrationer; multikroppsmodellering; rullingslager; rotordynamik; reducktionsprocesser;

    Sammanfattning : During the assembly of aircraft engines, some clearance is left in the rolling bearings mainly to reduce friction. However this clearance might allow the rolling element to vibrate during flight. Indeed, unwanted vibrations called non-synchronous vibrations (NSV) appear on the data recorded by the sensors on some development engines. LÄS MER

  4. 3. Hydraulic Erosion Simulation on the GPU for 3D terrains

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Sebastian Isheden; [2022]
    Nyckelord :Hydraulic Erosion; 3D erosion; CUDA; erosion; simulation; Vatten Erosion; 3D erosion; CUDA; erosion; simulering;

    Sammanfattning : Erosion is the action of various natural processes, such as water flow, wind and gravity, that displaces material from one area to another. Creating physically-based models of these complex phenomena has been a major challenge in creating realistic terrain in video games in a fast way, without having a 3D artist model the terrain by hand. LÄS MER

  5. 4. How to make the most of open data? A travel demand and supply model for regional bicycle paths

    Master-uppsats, KTH/Transport och systemanalys

    Författare :Laurent Cazor; [2021]
    Nyckelord :Planning Support System PSS ; Four-Step Model; Gravity Model; Distance-Decay function; Binary Logit Model; Level of Traffic Stress LTS ; Geographic Information System GIS ;

    Sammanfattning : Detta examensarbete syftar till att svara på ett av Trafikverket fastställt problem: en gemensam regional cykelplanerings process skulle göra dem billigare och mer jämförbara. De erbjuder för närvarande planerarna en modell som utvecklades av Kågeson 2007. LÄS MER

  7. 5. Implementering av hybriddrivlina i BAE Systems bandvagn

    Uppsats för yrkesexamina på grundnivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :Albin Johansson; Krzysztof Lorenz; [2021]
    Nyckelord :tyngdpunkt; fordon; bandvagn;

    Sammanfattning : This work has been carried out at BAE Systems in Örnsköldsvik. The background to the work is that BAE Systems is developing a hybrid electric driveline for the BvS10 tracked vehicle (Sirius project), but lacks the necessary drawings, i.e. a 3D model, for the construction of this vehicle. LÄS MER