Sökning: "wheel damages"

Visar resultat 1 - 5 av 14 uppsatser innehållade orden wheel damages.

  1. 1. The Effect of High Wheel Impact Load on the Rail Reliability - a Case Study at Bodsjön

    Master-uppsats, KTH/Spårfordon

    Författare :Ngoc Thúy Vy Dang; [2021]
    Nyckelord :rail defects; rail reliability; Ultrasonic Test; wheel damage; Wheel Impact Load Detector; statistics; järnvägsdefekter; järnvägssäkerhet; ultraljudstest; hjulskador; hjullastningsdetektor; statistik;

    Sammanfattning : This study focuses on the reliability of railway track in the relation with high loads resulted from wheel damages, where higher (dynamic) vertical wheel loads are expected from trains with damaged wheels. The Swedish Transport Administration (Trafikverket) has monitored and recorded data of rail defects and breaks. LÄS MER

  3. 2. Improving the validation of a railway vehicle model in the virtual certification process

    Master-uppsats, KTH/Spårfordon

    Författare :Bente de Leeuw; [2021]
    Nyckelord :Rail vehicle dynamics; Rail vehicles; Rail profiles; wheel profiles; model validation; Dynamik; järnvägsfordon; järnvägsprofiler; hjulprofiler; modellvalidering.;

    Sammanfattning : Before vehicles can be placed in service it has to complete an authorisation process. At the moment,this process is largely depended on tests. This is, however, an expensive and long process. With new technologies and improved simulations this process can be shortened and the costs can be lowered. LÄS MER

  4. 3. Simulation Model for Forestry Ground and Vegetation Damage

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

    Författare :Elias Hökfors; [2021]
    Nyckelord :Forest ground; forest machines; soils; soil mechanics; simulators; Unreal Engine; AGX Terrain;

    Sammanfattning : Training simulators are valuable tools in education of forest machine operators. One important part of the education is to learn about damages occurring due to the forest machines and how they can be avoided. Two types of damages are especially severe, soil compaction and formation of wheel ruts. LÄS MER

  5. 4. Investigation of sources of wheel-rail impact force deviation through dynamic simulations

    Master-uppsats, KTH/Fordonsdynamik

    Författare :Sumanth Ram Aravindababu; [2021]
    Nyckelord :Multi-body simulations; wheel damages; rail damage; damage thresholds; wheel-rail impact forces; classification; Flerkroppssimulering; hjulskador; rälskador; skadetrösklar; hjulslagkraft; rälslagkraft; klassificering;

    Sammanfattning : Due to the increase in demand on freight transportation it becomes necessary to avoid delays to ensure that the goods reach its destination on time. The main factors causing disturbances in the traffic on the mainline is the breakdown of vehicles mainly due to damaged wheels. LÄS MER

  7. 5. Styrning av en roterande sorptionsavfuktare i en oventilerad ishall

    Magister-uppsats, Högskolan i Gävle/Energisystem och byggnadsteknik

    Författare :Simon Lindqvist; [2020]
    Nyckelord :Ice rink arena; control strategy; dehumidification; condensation; dewpoint; solid desiccant dehumidifier; energy efficiency; Ishallar; styrning; avfuktning; kondens; daggpunkt; roterande sorptionsavfuktare; energieffektivisering;

    Sammanfattning : Kondensbildning är ett stort problem i ishallar vilket leder till stora konsekvenser ifall det inte åtgärdas. Installation av ett avfuktningssystem är ett måste i ishallar men det betyder högre energianvändning. LÄS MER