Sökning: "Train Passage Analysis"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden Train Passage Analysis.

  1. 1. 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

  3. 2. Liminal life at railway stations: An ethnographic investigation of commuters' everyday rituals

    Master-uppsats, Lunds universitet/Avdelningen för etnologi

    Författare :Meng Cheng; [2020]
    Nyckelord :railway stations; commuter; rites of passage; liminality; infrastructure; cultural analysis; everyday rituals; Cultural Sciences;

    Sammanfattning : Building functional and effective railway station infrastructures has become a strategy to encourage sustainable mobility. Addressing on commuters, this thesis aims to investigate how station infrastructures frame commuters' commuting experience. LÄS MER

  4. 3. Soil-Structure Interaction Analysis of Portal Frame Railway Bridges : Numerical Analysis of Two Case Study Bridges

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Nils Sandqvist; Marko Milicevic; [2020]
    Nyckelord :Soil-structure Interaction; Portal Frame Bridge; Dynamic Analysis; Perfectly Matched Layer; Train Passage Analysis; Railway Bridge; High Speed Train v;

    Sammanfattning : This thesis concerns dynamic Soil-Structure Interaction (SSI) analysis of portal framerailway bridges. Dynamic problems are common for bridges used for high speedrailway traffic. The passing trains induce harmonic loads on the bridges causingvibration amplitudes that may cause damage to the bridge structures and userdiscomfort. LÄS MER

  5. 4. Using Bidirectional Encoder Representations from Transformers for Conversational Machine Comprehension

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Evangelina Gogoulou; [2019]
    Nyckelord :conversational machine comprehension; question answering; transformers; self-attention; language modelling; samtalsmaskinförståelse; frågesvar; transformatorer; självuppmärksamhet; språkmodellering;

    Sammanfattning : Bidirectional Encoder Representations from Transformers (BERT) is a recently proposed language representation model, designed to pre-train deep bidirectional representations, with the goal of extracting context-sensitive features from an input text [1]. One of the challenging problems in the field of Natural Language Processing is Conversational Machine Comprehension (CMC). LÄS MER

  7. 5. CFD ANALYSIS OF PRESSURE WAVES AND LOADS ON NON-TIGHT TRAINS PASSING TUNNELS

    Master-uppsats, KTH/Mekanik

    Författare :Giovanni Forasassi; [2015]
    Nyckelord :;

    Sammanfattning : Computing the loads for a train passing a tunnel requires to predict both the external and the internal pressure variations in time, both of which are strong and quick for a non-pressure tight train. The key achievement of this work has been the development of 3D CFD Star-CCM+ overset mesh simulations capable of simulating the single train tunnel entry and tunnel passage as well as the two trains crossing inside the tunnel. LÄS MER