Sökning: "Sleeper"

Visar resultat 16 - 20 av 26 uppsatser innehållade ordet Sleeper.

  1. 16. Equivalent Dynamics Model of Ballasted Track Bed

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Said Daoud; Xie Guowei; Liu Xiaoming; [2012]
    Nyckelord :ABAQUS; Ballast; modeling; simulation; train-track; fracture mechanics;

    Sammanfattning : Increase of track maintenance costs and change of track geometry are due to the vibration of ballasted railway. The aim of this thesis work is to model train-track system as a multiply degree of freedom systems by Lump Parameter Method. LÄS MER

  3. 17. 3D-models of railway track for dynamic analysis.

    Master-uppsats, KTH/Transportvetenskap

    Författare :Huan Feng; [2011]
    Nyckelord :track dynamics; railway track modelling; finite element analysis; receptance;

    Sammanfattning : In recent decades, railway transport infrastructures have been regaining their importance due to their efficiency and environmentally friendly technologies. This has led to increasing train speeds, higher axle loads and more frequent train usage. LÄS MER

  4. 18. Dynamic model of freight wagon

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Saeed Hossein Nia; [2011]
    Nyckelord :Track; modeling; simulation; rolling contact fatigue; freight wagon; three-piece bogie ;

    Sammanfattning : The Swedish iron ore company LKAB uses freight wagon to transport iron ore from the mines in Kiruna and Malmberget to Luleå and Narvik. Within a research project at KTH Rail Vehicles a simulation model of the freight vehicle has been built up within the Multibody simulation code GENSYS. LÄS MER

  5. 19. Failure analysis of railway switches and crossings for the purpose of preventive maintenance.

    Master-uppsats, KTH/Transportvetenskap

    Författare :Seyedahmad Jalili Hassankiadeh; [2011]
    Nyckelord :Turnout; Rail; Sleeper; Ballast; Sub grade; Failure Mode and Effect Analysis FMEA ; Rectification; Risk Priority Number RPN ; ;

    Sammanfattning : In the Swedish railway network there are about 12000 units of track switches and crossings, which at 13000 Km, make up about 5.5 percent of the total track length. However, the maintenance cost for S&C is more than 13 percent of the total maintenance cost which is high in comparison with their proportion. LÄS MER

  7. 20. Train-Bridge Interaction on Freight Railway Lines

    Uppsats för yrkesexamina på avancerad nivå, KTH/Bro- och stålbyggnad

    Författare :Davide Martino; [2011]
    Nyckelord :train-bridge interaction; dynamics; acceleration; freight train models; track models;

    Sammanfattning : This study investigates the dynamic response of a railway bridge under train passage. Three load models designed around the Swedish Steel Arrow freight train are tested and compared. A series of Concentrated Forces, a succession of single degree of freedom Sprung-Masses, and a sequence of complex multi-degree of freedom Train Wagons. LÄS MER