Sökning: "wheel rail contact"

Visar resultat 1 - 5 av 24 uppsatser innehållade orden wheel rail contact.

  1. 1. Optimering av hjulprofil till en spårgående fordonsprototyp

    Kandidat-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Olof Skagerlind; Gabriel Forsling; [2023]
    Nyckelord :Delsbo Electric; Wheel profile; Track vehicle; Train Wheel; Delsbo Electric; hjulprofil; spårfordon; tåghjul;

    Sammanfattning : Hållbara transporter är en viktig faktor för att minska koldioxidutsläppen och bidra till en mer hållbar framtid. Den svenska järnvägen är en viktig del av infrastrukturen och transporterar dagligen hundratusentals människor och stora mängder varor. Transportsektorn förbrukar nu cirka en tredjedel av den totala energin i världen. LÄS MER

  3. 2. Modified train wheel wear calculation for fast calculation

    Master-uppsats, KTH/Spårfordon

    Författare :Shaoyao Chen; [2021]
    Nyckelord :Precise contact point detection; Material Flexibility; Multiple contact points detection; Winkler theory; wear calculation; fast calculation; Exakt detektion av kontaktpunkter; materialflexibilitet; detektering av flera kontaktpunkter; Winkler-teori; förslitningsberäkning; snabb beräkning;

    Sammanfattning : In this thesis, a modified wear calculation method is developed to calculate the train wheel wear, which can give less precise but faster results compared to the classic wear calculation method. This modified method is developed based on the classic wear calculation method developed by Jendel, which uses Hertz theory and Kalker’s simplified theory to calculate the contact variables and uses Achard theory to calculate the wear volume in an iterative manner. LÄS MER

  4. 3. Simulation of air quality in underground train stations

    Master-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Benjamin Söderberg; [2020]
    Nyckelord :PM10; aerosols; air pollution; particulate matter; emission factors; underground train station; PM10; luftkvalité; tåg; emissionsfaktorer; underjordiska tågstationer;

    Sammanfattning : Particulate matter (PM) is a widespread air pollutant of microscopic particles that are suspended in the atmosphere. There is high concentration of PM in underground train stations and tunnels. The concentration of particulate matter (PM10) measured in Stockholm’s metro varies significantly between day and nighttime traffic of trains. LÄS MER

  5. 4. Improvement of Steering Performance of a Two-axle Railway Vehicle via Look-up Tables Estimation

    Master-uppsats, KTH/Spårfordon

    Författare :Prapanpong Damsongsaeng; [2020]
    Nyckelord :Two-axle railway vehicle; Active steering system; Look-up tables; Time-varying wheel-rail contact parameters; Två-axligt järnvägsfordon; aktiv styrning; uppslagstabeller; tidsvarierande hjul-rälskontaktparametrar;

    Sammanfattning : A conceptual design of an innovative two-axle lightweight railway vehicle for commuter services is carried out at KTH Railway Group. An active wheelset steering is introduced to improve the curving performance of the vehicle, which is one of the critical performance requirements. LÄS MER

  7. 5. PREVENTION OF WHEEL WEAR, A CASE STUDY : Developing a functioning wheel profile for rail-mounted transportation trolley.

    Kandidat-uppsats, Högskolan i Skövde/Institutionen för ingenjörsvetenskap

    Författare :Agnieszka Inglot; Oskar Franzén; [2019]
    Nyckelord :Wear prediction; Rail; Flanged wheel; Archards model; Hertzian contact problem; Abrasive wear; Adhesive wear; Theorethical prediction model;

    Sammanfattning : This bachelor’s degree project aimed to improve the wheel profile of a rail mounted trolley and determine the cause of wheel failure. The proceedings of this project where modelled after an approach for solving wear problems with an emphasis on designing for sustainability. LÄS MER