Sökning: "ballasted track"

Visar resultat 16 - 20 av 22 uppsatser innehållade orden ballasted track.

  1. 16. Slab track systems for high-speed railways.

    Master-uppsats, KTH/Väg- och banteknik

    Författare :Georgios Michas; [2012]
    Nyckelord :Railway slab track; High-speed tracks; Finite element analysis; Rheda; Maintenance; Life Cycle Cost;

    Sammanfattning : In the last 40 years an increase in train speed and axle load around the world and other challenges in the conventional ballasted track system gave birth to ballastless railway track system. This study examines in depth the various slab track systems that are being used today. LÄS MER

  3. 17. 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

  4. 18. Parametric study of bridge response to high speed trains, ballasted track on concrete bridges

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Shahbaz Rashid; [2011]
    Nyckelord :Ballast stiffness; transition zones; Railway bridges; the Swedish X2000 train; vertical deck acceleration; MATLAB-ABAQUS model; Finite element analysis.;

    Sammanfattning : When a train enters a bridge, passenger sitting inside will feel a sudden bump in the track, which not only affect the riding comfort of the passengers but also put a dynamic impact on the bridge structure. Due to this impact force, we have very serious maintenance problems in the track close to the bridge structure. LÄS MER

  5. 19. Simply supported composite railway bridge: a comparison of ballasted and ballastless track alternatives : Case of the Banafjäl Bridge

    Master-uppsats, KTH/Bro- och stålbyggnad; KTH/Järnvägsgruppen, JVG

    Författare :Guillaume Gillet; [2010]
    Nyckelord :High-speed railway line; composite bridge; dynamic; ballastless track; modal analysis;

    Sammanfattning : .... LÄS MER

  7. 20. ANALYSIS & STUDY OF AI TECHNIQUES FORAUTOMATIC CONDITION MONITORING OFRAILWAY TRACK INFRASTRUCTURE : Artificial Intelligence Techniques

    Master-uppsats, Datateknik

    Författare :Tanmay Podder; [2010]
    Nyckelord :Artificial intelligence; Non-destructive testing; Condition Monitoring; Machine Vision; Neural Network; Genetic Algorithm; Fuzzy Logic; Expert System.;

    Sammanfattning : Since the last decade the problem of surface inspection has been receiving great attention from the scientific community, the quality control and the maintenance of products are key points in several industrial applications.The railway associations spent much money to check the railway infrastructure. LÄS MER