Sökning: "High-speed railway"

Visar resultat 1 - 5 av 105 uppsatser innehållade orden High-speed railway.

  1. 1. Brobanor och dess egenskaper för kommande höghastighetsjärnväg : Brobanors användning och egenskaper i samband med höghastighetsjärnväg

    Kandidat-uppsats, KTH/Byggteknik och design

    Författare :Haris Zubanovic; Hajk Saakyan; [2023]
    Nyckelord :Bridge lanes; cost; high-speed railway; maintenance; precast bridge elements; Brobanor; höghastighetsjärnväg; kostnad; underhåll; prefabricerade broelement;

    Sammanfattning : SammanfattningSvensk järnväg har aldrig varit mer belastad och trafikerad än idag, och värre kommer det att bli. Det har inte pågått några större investeringar i svensk järnväg sen 1990-talet, effekterna av den strategin börjar bli alltmer uppenbar. LÄS MER

  3. 2. Dynamic Analysis of Portal Frame Bridges for High-Speed Trains : A Parametric Study

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Antonio Dib; Ramayana Salgado; [2023]
    Nyckelord :;

    Sammanfattning : A high-speed railway network is important for Sweden’s development. However, anincreasing train speed brings new challenges in bridge design due to higher bridgeaccelerations. LÄS MER

  4. 3. Holistic embedding of equivalent conicity in wheelset maintenance

    Master-uppsats, KTH/Väg- och spårfordon samt konceptuell fordonsdesign

    Författare :Philipp Linzbichler; [2023]
    Nyckelord :Railway Operation; Equivalent Conicity; Wheelset Maintenance; Smart Maintenance; Data Analysis; Järnvägsdrift; Ekvivalent Konicitet; Hjulset Underhåll; Smart Underhåll; Dataanalys;

    Sammanfattning : With continuing digitization of railways an increasing number of data is recorded but particularly in operation advanced analysis tends to be partially rudimentary. Yet, it is essential to implement sophisticated processing for all records in order to develop more purposeful and predictive vehicle maintenance strategies that adhere to the increasing requirements imposed by the homologation. LÄS MER

  5. 4. Numerical modelling of high-speed railway transition zone

    Master-uppsats, KTH/Jord- och bergmekanik

    Författare :Karl Norberg; [2022]
    Nyckelord :Railway geotechnics; Bridge; Ballastless track; Transition zone; High-speed railway; Finite element method; Track stiffness;

    Sammanfattning : Transition zones are changes in the track structure, detected by an abrupt deviationin track stiffness and/or differential settlements. One inevitable transition zone is thebridge approach. This study has investigated in this transition zone, adapted for highspeed,ballastless track. LÄS MER

  7. 5. Reliability-Based Sensitivity Analysis of the Dynamic Response of Railway Bridges

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Hasan Al-Zubaidi; [2022]
    Nyckelord :Railway bridges; High-speed trains; Simply supported beam; Global sensitivity analysis; Uncertainty quantification; Reliability; Ballast instability; Running safety; Passenger comfort;

    Sammanfattning : In response to the planned increase in operational speeds and axle loads of passengertrains that may lead to resonance-induced excessive vibrations in railway bridges,recent studies examined the reliability of bridges concerning train running safety andpassenger comfort limit states. In this respect, valuable information regarding theimportance of input variables can be obtained by conducting Sensitivity Analysis (SA). LÄS MER