| 1. |
- Andersson, Evert, et al.
(author)
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Gröna Tåget - Green Train - Train for tomorrow's travellers
- 2011
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In: ZEVrail. - Berlin : Georg Siemens Verlag. - 1618-8330. ; 135, s. 140-153
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Journal article (other academic/artistic)abstract
- Gröna Tåget (Green Train) is a Swedish research and development programme aiming at defining a concept and developing technology for the next generation high-speed trains, suitable for the Northern European countries. The programme involves almost all major stakeholders in the railway business in Sweden. Main sponsors are Trafikverket (former Banverket) as well as the railway industry and operators (Bombardier, SJ and others). The total budget is around 15 million EUR. The technical coordination is with the Royal Institute of Technology (KTH) in Stockholm. The program started in 2005 and will continue until the end of 2011.Gröna Tåget is intended to be a fast, track-friendly, electric tilting train that can not only maintain higher speeds than conventional trains on sections with curves, but special versions could allow 300 km/h or more on future dedicated high-speed lines. Gröna Tåget shall be more attractive and more cost effective both to travellers and to operators than today’s trains. Environmental performance (energy use per passenger, noise) is expected to be still better than existing trains at lower speed.
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| 2. |
- Andersson, Evert, et al.
(author)
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Radial self-steering bogies - Development, advantages and limitations
- 2007
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In: ZE Vrail - Glasers Annalen: Zeitschrift fuer das gesamte System Bahn. - 1618-8330. ; 131:Suppl., s. 248-259
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Journal article (peer-reviewed)abstract
- Considering the total cost of railway operations, It is important to reduce the deterioration caused to the track by rail vehicles and vice versa. Radial steering running gear, where the wheelsets take up approximate radial positions in curves, is an important mean of reducing rail and wheel wear. They also allow curves to be negotiated at higher lateral acceleration on non-perfect track, without exceeding stipulated limits for lateral track shift forces. In order to run dynamically stable at high speed, the damping of the bogie must be appropriate, in particular the yaw damping between bogies and car body. Since the mid-1970's radial self-steering bogles have been developed and used in about 1 200 passenger rail vehicles in Scandinavia. This development continues and during 2006 a test train with radial self-steering bogies is run in speeds up till 281 km/h as part of the Swedish R&D program "GrönaTå get" (GreenTrain). Although there are limitations in the performance of passively self-steering bogles they are a simple and proven solution. Ultimately, In the future actively controlled radial steering may be considered asan appropriate mean to achieve higher performance and track-friendliness.
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| 3. |
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| 4. |
- Jönsson, Per-Anders, et al.
(author)
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Improving Ride Comfort in Freight Wagons with Link Suspension Running Gear using Hydraulic Dampers
- 2007
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In: ZEV Rail Glasers Annalen. - 1618-8330. ; 131:Suppl., s. 230-240
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Journal article (peer-reviewed)abstract
- A majority of the traffic related track deterioration cost originates from freight traffic, With heavier and faster freight trains the maintenance cost Is likely to increase. The present paper focuses on the possibility to improve ride comfort and reduce track forces on standard freight wagons with link suspension. The variation of characteristics in link suspension running gear is considerable and unfavourable conditions leading to hunting are likely to occur. Supported by on-track tests and multibody dynamic simulations it is concluded that the running behaviour of two-axle wagons with UIC double-link suspension as well as wagons with link suspension bogies (G-type) can be improved when the running gear are equipped with supplementary hydraulic dampers.
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| 5. |
- Marschnig, Stefan, et al.
(author)
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Universal Cost Model Bogie 2.0 : Bewertung von Innovationen auf Gesamtsystemniveau
- 2022
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In: ZEVrail. - : Georg Siemens Verlag. - 1618-8330. ; 146
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Journal article (other academic/artistic)abstract
- Im Rahmen des IP1 von Shift2Rail liegt der Fokus auf kosteneffizienten und zuverlässigen Zügen. Das open call Projekt Next Gear unterstützt dabei beim Thema Fahrwerke das laufende Projekt Pivot ². Ein vorrangig akademisches Konsortium untersucht die Möglichkeiten zur Gewichtsreduktion bei Drehgestell und Radsatz durch den Einsatz neuer Materialien, Fertigungsmethoden und Fahrzeugarchitektur. Das Universal Cost Model, das in einem früheren S2R Projekt entwickelt wurde, unterstützt die wirtschaftliche Bewertung von Innovationen, indem alle beeinflussbaren Kosten über den gesamten Lebenszyklus erfasst werden. Das Modell wird mit dem Schwerpunkt Benutzerfreundlichkeit überarbeitet, mit der Vision eines ausgewogenen Verhältnisses von Einfachheit und Genauigkeit, einfacher Bedienung und wissenschaftlicher Exaktheit. Eine neue Benutzeroberfläche, Standardwerte für den Fall, dass Eingaben fehlen, und bessere Erklärungen zur Verwendung des UCM sollten eine weit verbreitete Nutzung des Kostenberechnungsschemas im Eisenbahnsektor für verschiedene Stakeholder unterstützen.
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| 6. |
- Orvnäs, Anneli, et al.
(author)
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On-track tests with active lateral secondary suspension : a measure to improve ride comfort
- 2008
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In: ZEV Rail Glasers Annalen. - 1618-8330. ; 132:11-12, s. 469-477
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Journal article (peer-reviewed)abstract
- At increased rail vehicle speed it may be difficult to maintain acceptable passenger ride comfort with conventional passive secondary suspension. This paper presents the development of an active secondary suspension that provides good ride comfort improvements, but still at an acceptable cost level to enable future implementation. On-track tests have been performed with a two-car Regina train, using electro-hydraulic actuators together with sky-hook damping control and a Hold-Off-Device function to actively control the secondary suspension. The evaluated measurement results show that the active suspension system significantly reduces the lateral dynamic carbody motions and the lateral quasi-static displacements between carbody and bogies in curves, which improves the ride comfort and allows higher speeds, particularly in curves.
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| 7. |
- Wennberg, David, 1984-, et al.
(author)
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Benefits of weight reduction in high speed train operations
- 2013
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In: ZEV rail Glaser Annalen. - 1618-8330. ; 137:3, s. 77-87
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Journal article (peer-reviewed)abstract
- This paper highlights one of the main issues with light weight sandwich design in high-speed rail vehicles: The benefit of light weighting is said to be marginal when considering high-speed trains. A run cycle based analysis method is used to evaluate energy savings, wear reduction, downsizing possibilities and reduced travel time as function of reduced weight. Depending on operating conditions, the relation between weight reduction and energy consumption for high-speed trains is shown to be equivalent of that for both automobiles and aircrafts.
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