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Showing result 1 - 5 of 23 essays matching the above criteria.

1. 1. Development and Analysis of Small Signal DQ-Frame Model for Low Frequency Stability of Train Converters

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Fabian Tidner; [2023]
   Keywords : Low Frequency stability; DQ-frame modeling; Single phase converter; Electric rail way systems; Lågfrekvent stabilitet; DQ-ram modellering; Enfasig likriktare; Elektriska järnvägssystem;

   Abstract : In order to meet the increasing demand for sustainable transportation, trains need to run with tighter schedules, more departures and more trains in depot. Multiple trains in depot has been linked to low frequency instability at many locations around the world. READ MORE

3. 2. Alternative traction system for road-rail vehicles

   University essay from Lunds universitet/Innovation

   Author : Jakob Runevad; [2023]
   Keywords : Product development; electric traction; construction equipment; road-rail vehicles.; Technology and Engineering;

   Abstract : Excavators have traditionally been diesel driven with hydraulic actuators, but with the ongoing electrification of vehicles, smaller electric excavators are getting more common. Larger electrical excavators are still in a prototyping or early production stage but can be expected to grow. READ MORE

4. 3. Analysis of combined response of railway bridge and track : A parametric finite element model of the bridge across Bryngeån

   University essay from KTH/Bro- och stålbyggnad

   Author : Moa Nolinder; [2023]
   Keywords : ;

   Abstract : When designing a railway bridge it is common to consider and designthe bridge structure and the track structure separately. However, theyare connected and that interaction generates a combined response and aforce transfer between them. READ MORE

5. 4. Influence of load distribution on trough bridges

   University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

   Author : Jacob Gustafsson; [2021]
   Keywords : Bridge; Trough bridge; Concrete; Load distribution; Ballast;

   Abstract : There are approximately 4000 railway bridges in Sweden and a common construction type is the short span concrete trough bridge. With the current standards the load distribution through ballast is assumed to be uniformly distributed with a distribution slope of 2:1 according to the Swedish Administration of Transport or 4:1 according to Eurocode 1. READ MORE

6. 5. Paratransit and Bus Rapid Transit Interaction Approaches and Corresponding Barriers

   University essay from Uppsala universitet/Institutionen för geovetenskaper

   Author : Messner Laura; [2020]
   Keywords : informal public transport; multi-regimes; socio-technical transition theory; stakeholder theory; Sub- Saharan Africa; sustainable development;

   Abstract : Public transport in many Sub-Saharan African cities consists of paratransit, mini-to-medium-sized buses, which provide public transport and operate demand-driven and unscheduled. This form of public transport is often seen as less safe, less dependable, and environmentally unfriendly. READ MORE