Search for dissertations about: "catenary"
Showing result 6 - 10 of 20 swedish dissertations containing the word catenary.
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6. Numerical study on multi-pantograph railway operation at high speed
Abstract : Multi-pantograph operation allows several short electric multiple unit (EMU) trainsets to be coupled or decoupled to adapt to daily or seasonal passenger-flow variation. Although this is a convenient and efficient way to operate rolling stock and use railway infrastructure, pantographs significantly influence each other and even significantly change the dynamic behaviour of the system compared to single-pantograph operation in the same condition. READ MORE
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7. Analysis of Fatigue Characteristics in Mooring Lines and Low Voltage Cables for Wave Energy Converters
Abstract : To reduce both carbon emission and fossil fuel consumption, there is a pressing need for the exploitation of renewable sources of energy such as biomass, hydropower, solar power, waves, and wind. This thesis addresses the application of wave energy, which has a large potential to contribute to the world’s renewable emission-free energy supply. READ MORE
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8. Increasing Energy Efficiency in Electric Trains Operation : Driver Advisory Systems and Energy Storage
Abstract : Electric traction is the most efficient traction system in the railway transportation. However, due to the expensive infrastructure and high power demand from the grid, the share of electric trains in the railway transportation is still lower than other trains. READ MORE
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9. Measures to Enhance the Dynamic Performance of Railway Catenaries
Abstract : The pantograph-catenary system is used in railways to transfer electric power from infrastructure to trainset. As the pantograph slides against the catenary, the contact between the two surfaces is not stable due to stiffness variation, propagating wave and other environmental perturbation, especially at high speeds or in multi-pantograph operation. READ MORE
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10. Dynamic fail-safe behaviour of steel structures
Abstract : The fundamental behaviour and the capacity of steel structures subjected to loss of interior load-bearing elements are studied. The ultimate load-bearing and deformation capacity of certain beam-to-column connections and the dynamic fail-safe behaviour of some ordinary steel structures are investigated in detail. READ MORE