Sökning: "track vibration"

Visar resultat 1 - 5 av 27 avhandlingar innehållade orden track vibration.

  1. 1. Countermeasures against railway ground and track vibrations

    Författare :Robert Hildebrand; KTH; []
    Nyckelord :ground vibration; vibration screen; track vibration; railway vibration; seismic barrier;

    Sammanfattning : Railway track and ground vibrations are considered, with anemphasis on methods of mitigation ("countermeasures"), forapplication to wayside disturbance problems.Original field measurements from two sites in Sweden, aswell as borrowed measurements from Norway, provide vibrationresults at many points on the track, on and underneath theground surface, for a variety of trains, both with and withoutcountermeasures in-place. LÄS MER

  3. 2. Railway Track Stiffness : Dynamic Measurements and Evaluation for Efficient Maintenance

    Författare :Eric Berggren; Mats Berg; Laurent Schmitt; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Railway track stiffness; maintenance; soil dynamics; measurement; simulation; vibration; Vehicle engineering; Farkostteknik;

    Sammanfattning : Railway track stiffness (vertical track load divided by track deflection) is a basic parameter oftrack design which influences the bearing capacity, the dynamic behaviour of passing vehiclesand, in particular, track geometry quality and the life of track components. Track stiffness is abroad topic and in this thesis some aspects are treated comprehensively. LÄS MER

  4. 3. Insight Into Subsoil Condition Using Railway Track Alignment Measurements

    Författare :Jonas Majala; Jan Laue; Thorkild Maack Rasmussen; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Subgrade; Stiffness; Vibration; Frequency; Geoteknik; Soil Mechanics;

    Sammanfattning : .... LÄS MER

  5. 4. On Ground and Structural Vibrations Related to Railway Traffic

    Författare :Johan O. Jonsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wave propagation; wave field excitation; soil structure interaction; structural vibration; ground vibration; traffic vibration;

    Sammanfattning : The continuous development and integration of railway infrastructure, especially within urban areas, can cause ground and building vibrations to reach levels that bring discomfort to people. The growing risk of damage to buildings located in areas prone to ground vibration should not be underestimated. LÄS MER

  7. 5. Wheelset Structural Flexibility and Track Flexibility in Vehicle-Track Dynamic Interaction

    Författare :Nizar Chaar; Stefano Bruni; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Vehicle-track dynamic interaction; wheelset structural flexibility; Structural and vibration physics; Struktur- och vibrationsfysik;

    Sammanfattning : This thesis investigates the influence of wheelset structural flexibility and track flexibility on the vehicle-track dynamic interaction, mainly in terms of wheel-rail forces up to 200 Hz, using simulations and measurements. The previous knowledge in this field is first reviewed and summarized, then two case studies are selected for investigation. LÄS MER