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The Journal of Wheel/Rail Interaction
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Vehicle Design

WRI 2017 – Transit: System Optimization and Better Asset Management

July 3, 2017 | Filed under: Rail Transit, Vehicle Design, Vehicle/Track, Wheel/Rail Interaction, Wheel/Rail Profile

By Jeff Tuzik Optimization, modernization and asset management are critical to the efficient running of a rail transit system. While each program is beneficial in its own right, the importance of asset management has taken on new significance with the recent Federal Transit Administration’s (FTA) rule making on the State …

WRI EU 2015, Part 2: Theory to Practice, Laboratory to Track

June 20, 2016 | Filed under: Rail Grinding, Track Geometry, Vehicle Design, Wheel/Rail Interaction, Wheel/Rail Profile

By Jeff Tuzik See Part 1 A thorough understanding of the forces contributing to wheel/rail interaction requires a grasp of both theoretical concepts and operational practices. Speakers at the 2015 Wheel Rail Interaction Conference, European Union (WRI EU) addressed both, presenting findings from the lab and operating environment of vehicles …

The truck bolster bowl: Is it a bowl or a bearing?

January 3, 2014 | Filed under: Vehicle Design

by Gary Wolf • October 2005 Like many aspects of the three-piece truck, performance issues surrounding the truck bolster bowl and body centerplate are often misunderstood. One of the biggest misunderstandings is that the bolster bowl is actually a bearing. Years ago at a meeting where truck performances issues were …

Making the Case for Long Travel Constant Contact Side Bearings

January 3, 2014 | Filed under: Vehicle Design, Vehicle/Track

by Bill O’Donnell • July 4, 2005 As part of its efforts to reduce the stress state on North American railroads, the Association of American Railroads (AAR) mandated that all new cars ordered after January 1, 2002, must be equipped with constant contact side bearings. Constant contact side bearings (CCSBs) raise the threshold …

Vehicle Side Bearings: Function, Performance and Maintenance (Part 2 of 2)

January 3, 2014 | Filed under: Vehicle Design, Vehicle/Track

By Gary Wolf • May 04, 2005 Part 1 of this two-part article explored the importance of roller style side bearings in maintaining proper vehicle performance and how improper maintenance of side bearings can directly affect wheel/rail forces. Part 2 examines the purpose, types of designs and maintenance of the …

Reducing Noise and Vibration on NYCT

January 3, 2014 | Filed under: Friction Management, Noise and Vibration, Rail Transit, Vehicle Design, Vehicle/Track

by Bob Tuzik, January 1, 2005 Any problem affecting the New York City Transit is by default a big problem. The process of transporting more than four million passengers per day in 6,000 vehicles on more than 700 miles of elevated, underground at-grade mainline tracks, on a system that operates 24 hours …

Vehicle Side Bearings: Function, Performance and Maintenance (Part 1 of 2)

January 3, 2014 | Filed under: Vehicle Design, Vehicle/Track

By Gary Wolf • April 04, 2005 Side Bearings serve as support elements on the truck bolster and are located to the side of the centerplate. The function of the side bearing is to support the underside of the car body bolster in the event the car leans to one side …

Engineering the Wheel/Rail Interface for Rail Transit

October 18, 2013 | Filed under: Rail Transit, Track Geometry, Vehicle Design, Vehicle/Track, Wheel/Rail Interaction

By Jeff Tuzik • July 2010 Wheel/rail interaction is complex, variable and difficult to manage — especially on rail transit systems where noise, vibration and ride quality present daily challenges. As a result, managing the wheel/rail interface requires constant attention and innovation. Speakers at Advanced Rail Management’s Rail Transit 2010 …

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