Sökning: "ballast track"

Visar resultat 16 - 20 av 29 uppsatser innehållade orden ballast track.

  1. 16. Upprustningsmetoder för en bankropp : En jämförelse ur ett LCC-perspektiv

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Byggteknik

    Författare :Rehn Karin; [2014]
    Nyckelord :;

    Sammanfattning : In recent years, the Swedish railway track system has been neglected in terms of capacity and maintenance. To adapt the existing system to current traffic load there is a great need for extensive improvement and maintenance. Shortcomings are especially occurring on older embankments running over soft subgrades. LÄS MER

  3. 17. LINK 500- Concept Railtrack Layer : Future of railtrack construction in India and other emerging economies

    Master-uppsats, Institutionen Designhögskolan

    Författare :Apurba Pawar; [2013]
    Nyckelord :Railtrack; railway construction; Concept; Volvo; India;

    Sammanfattning : Indian railway which was started in 1853 has grown more than 10-fold between 1951 and 2007, but the rail track length has only grown 1.4 times in this period. LÄS MER

  4. 18. Crosswind assessment of trains on different ground configurations

    Master-uppsats, KTH/Järnvägsteknik

    Författare :Nachiyappan Venkatasalam; [2013]
    Nyckelord :Crosswind; ICE3; true flat ground TFG ; single track ballast and rail STBR ; atmospheric boundary layer ABL ; AeroTRAIN; CFD.;

    Sammanfattning : Cross wind analysis is one of the important safety measures for rail vehicle certification. The objective of this study is to identify which vehicle certification ground setup, true flat ground (TFG) or single track ballast and rail (STBR) represents a more realistic ground setup with atmospheric boundary layer (ABL) wind inlet and also to represent an embankment scenario. LÄS MER

  5. 19. Influence of the ballast on the dynamic properties of a truss railway bridge

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Lucie Bornet; [2013]
    Nyckelord :Ballast; Railway bridges; Experimental dynamics; Finite element modelling; Natural frequencies; Eigenmodes; Bridge stiffness.;

    Sammanfattning : To deal with a rapid development of high-speed trains and high-speed railways, constant improvement of the railway infrastructure is necessary and engineers are continuously facing challenges in order to design efficient and optimized structures. Nowadays, more and more railway bridges are built and thus, they require the engineers’ attention both regarding their design and their maintenance. LÄS MER

  7. 20. Railway sleeper modelling with deterministic and non-deterministic support conditions.

    Master-uppsats, KTH/Väg- och banteknik

    Författare :Shan Li; [2012]
    Nyckelord :railway sleeper; sleeper-ballast interaction; random support condition; finite element modelling; Neural Network;

    Sammanfattning : Railway sleepers have important roles in the complex railway system. Due to different loading condition, poor maintenance of sleeper or bad quality of ballast, a random load distribution along the sleeper-ballast interface may occur. LÄS MER