Sökning: "Railway"
Visar resultat 16 - 20 av 452 avhandlingar innehållade ordet Railway.
16. Interpretation of Railway Track Alignment Measurements in a Geodynamic Perspective
Sammanfattning : The development in society means that infrastructure like ballasted railway systems are facing challenges due to request for increased number of high-speed trains and heavier freight trains. This implies that ballasted railways get an increased impact from larger dynamic loads. LÄS MER
17. Railway Safety - Risks and Economics
Sammanfattning : Safety analysis is a process involving several techniques.The purpose of this thesis is to test and develop methodssuitable for the safety analysis of railway risks and railwaysafety measures. Safety analysis is a process comprisingproblem identification, risk estimation, valuation of safetyand economic analysis. LÄS MER
18. Utmattningsanalys av järnvägsbroar : En fallstudie av stålbroarna mellan Stockholm Central och Söder Mälarstrand, baserat på teoretiska analyser och töjningsmätningar
Sammanfattning : Föreliggande avhandling omfattar en fallstudie av utmattningsrisken för järnvägsbroarna mellan Stockholm Central och Söder Mälarstrand. Ett stort antal utmattningssprickor i broarna över Söderström och Söder Mälarstrand har sedan länge varit kända. LÄS MER
19. High Frequency Model of Electrified Railway Propulsion System for EMC Analysis
Sammanfattning : A model of the electrified railway propulsion system working in a wide frequency range is studied in this thesis. The high frequency modeling is the first stage to study and predict the Electromagnetic compatibility (EMC) problems in the electrified railway propulsion system, which are safety and reliability issues of high concern. LÄS MER
20. "Såsom allmänna inrättningar till gagnet, men affärsföretag till namnet" : SJ, järnvägspolitiken och den ekonomiska omvandlingen efter 1920
Sammanfattning : This study investigates the extent and nature of the interaction between the political, institutional andeconomical development in the Swedish railway sector 1920-1980. The work deals with two main issuse,which may be summarized in the following question: has the Swedish railway policy contributed to orcounterbalanced the stagnation of the railways, especially in the post-war period? The basic premise has beenthat the institutional framework from the 19th century, was well adjusted to the requirements in thecontemporary industrialization process. LÄS MER