Featured Research

from universities, journals, and other organizations

Rail researchers work on UK's first Tram-Train scheme

Date:
October 1, 2013
Source:
University of Huddersfield
Summary:
Engineers have been developing solutions for the problematic interface between a Tram-Train vehicle and two very different railway infrastructures.

Engineers have been developing solutions for the problematic interface between a Tram-Train vehicle and two very different railway infrastructures.
Credit: Image courtesy of University of Huddersfield

Under contract by Network Rail, a team of engineers at the University of Huddersfield's Institute of Railway Research (IRR) has been developing solutions for the problematic interface between a Tram-Train vehicle and two very different railway infrastructures.

The Tram-Train concept allows a railway vehicle to run in two operational modes; as an on-street tram serving city centres but also as a commuter train running on existing local rail network. This dual operation concept provides great flexibility and efficient use of railway infrastructure and connections.

Tram-Train first became popular in Germany and is now spreading rapidly through Europe.

The Sheffield-Rotherham Tram-Train scheme represents the UK's first trial of the concept and has provided the project partners, the Department for Transport, Network Rail (NR), Northern Rail, Stagecoach Supertram (SST) and South Yorkshire Passenger Transport Executive with many challenges, as Dr Paul Allen, Assistant Director of the IRR and project manager, explains: "One of these challenges is the wheel-rail interface, key to the vehicles' safe operation and a major driver for the ongoing life-cycle maintenance costs of the system."

By applying advanced computer modelling techniques, the team at the IRR has been able to predict vehicle dynamic behaviour on both the tight radius curves (<25m) of embedded city centre track and also the higher speed but less curvaceous sections on Network Rail mainline.

"These differing conditions require an interface design which maintains vehicle dynamic stability on straight track, whilst allowing adequate curving performance and derailment resistance in the city centre -- a classic engineering compromise in railway vehicle dynamics,"said Dr Allen.

David Crosbee is one of the Senior Research Fellows in the IRR and has been working with Paul Allen on the Tram-Train project: "The wheel design work was complicated by the very different rail head shapes of the two systems; the SST network having a very flat rail head profile, whilst the worn NR rail sections typically have a much smaller effective rail head shape. This necessitated compromise in the wheel and tread design with significant simulation work being carried out to optimise the new wheel profile shape. This allowed wheel-rail contact stress and wear rates to be minimised on both systems, whilst also maintaining safety against derailment."

The wheel profile was also required to operate under differing wheelset geometry conditions. This required a special stepped-wheel flangeback to maintain safe passage through both NR and SST switches and crossings and checked curves.

The new profile will now be subject to scrutiny by the SST project team and the Rail Safety and Standards Board (RSSB). Once the new wheel profile is approved for running on the mainline, tram test running can begin in earnest.


Story Source:

The above story is based on materials provided by University of Huddersfield. Note: Materials may be edited for content and length.


Cite This Page:

University of Huddersfield. "Rail researchers work on UK's first Tram-Train scheme." ScienceDaily. ScienceDaily, 1 October 2013. <www.sciencedaily.com/releases/2013/10/131001091333.htm>.
University of Huddersfield. (2013, October 1). Rail researchers work on UK's first Tram-Train scheme. ScienceDaily. Retrieved July 22, 2014 from www.sciencedaily.com/releases/2013/10/131001091333.htm
University of Huddersfield. "Rail researchers work on UK's first Tram-Train scheme." ScienceDaily. www.sciencedaily.com/releases/2013/10/131001091333.htm (accessed July 22, 2014).

Share This




More Matter & Energy News

Tuesday, July 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Government Approves East Coast Oil Exploration

Government Approves East Coast Oil Exploration

AP (July 18, 2014) The Obama administration approved the use of sonic cannons to discover deposits under the ocean floor by shooting sound waves 100 times louder than a jet engine through waters shared by endangered whales and turtles. (July 18) Video provided by AP
Powered by NewsLook.com
Sunken German U-Boat Clearly Visible For First Time

Sunken German U-Boat Clearly Visible For First Time

Newsy (July 18, 2014) The wreckage of the German submarine U-166 has become clearly visible for the first time since it was discovered in 2001. Video provided by Newsy
Powered by NewsLook.com
Obama: U.S. Must Have "smartest Airports, Best Power Grid"

Obama: U.S. Must Have "smartest Airports, Best Power Grid"

Reuters - US Online Video (July 17, 2014) President Barak Obama stopped by at a lunch counter in Delaware before making remarks about boosting the nation's infrastructure. Mana Rabiee reports. Video provided by Reuters
Powered by NewsLook.com
Crude Oil Prices Bounce Back After Falling Below $100 a Barrel

Crude Oil Prices Bounce Back After Falling Below $100 a Barrel

TheStreet (July 16, 2014) Oil Futures are bouncing back after tumbling below $100 a barrel for the first time since May yesterday. Jeff Grossman is the president of BRG Brokerage and trades at the NYMEX. Grossman tells TheStreet the Middle East is always a concern for oil traders. Oil prices were pushed down in recent weeks on Libya increasing its production. Supply disruptions in Iraq fading also contributed to prices falling. News from China's economic front showing a growth for the second quarter also calmed fears on its slowdown. Jeff Grossman talks to TheStreet's Susannah Lee on this and more on the Energy Department's Energy Information Administration (EIA) report. Video provided by TheStreet
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins