by Jeff Tuzik Rail corrugation is a common phenomenon. It’s found on both freight and transit lines around the world. The mechanisms behind corrugation are well understood, and there are many tools and techniques available to mitigate and remedy corrugation and its underlying causes. But this hasn’t always been the …
By Jeff Tuzik This article originally appeared in the July/August issue of Mass Transit. Friction management is a well-established technology in the rail transit industry. Its significance is such that it is considered one of the five pillars of wheel/rail interface management Davey Mitchell, Commercial Manager of Friction Modifier at …
by Jeff Tuzik “Engineers predict things,” said Cory Hogan, Director of Vehicle Dynamics Studies at Ensco Rail Inc. As computing power and modelling have become more sophisticated, engineers have increasingly used digital-twins to model vehicle, track, and component behavior with incredible fidelity. Like engineers, digital twins can be great predictors. …
by Jeff Tuzik Stuart Grassie, Principal, Rail Measurement Ltd and Stuart Grassie Engineering Ltd, is the recipient of the 2024 Worth Award. The award, presented by Wheel Rail Seminars at the annual Wheel/Rail Interaction conference in May, is named for Art Worth, who was Manager of Standards and retired as …
by Jeff Tuzik Rail transit properties around the world all contend with the same general issues. The corrugation on track in San Francisco is the same as corrugation on track in New Delhi. There may be a few different details, but the physics is constant. When it comes to addressing …
by Jeff Tuzik Part 1 of this article focused on past and present research into wheel condition and behavior monitoring via wayside-based continuous measurement systems. Using an overlapping combination of strain gauges and load cells, such systems can measure a wide range of dynamic wheel forces, and parameters like wheel …
by Jeff Tuzik The mechanics of wheel/rail interaction are in many ways at the core of railroading and the defining characteristic of how a train gets from here to there. Because rail typically represents a railroad’s largest financial asset, track-related issues are often front and center, even when it comes …
by Jeff Tuzik There are many forces that work to deteriorate track geometry over time. These forces don’t begin and end at the wheel/rail interface, they are transmitted to the vehicles and their components, and into the track structure and its components. On ballasted track, ballast absorbs these forces; and …
By Jeff Tuzik The unforgiving environment of the wheel/rail interface creates many damage mechanisms. These manifest in defects as varied as corrugations, rolling contact fatigue, and gage-corner cracking, to name only a few. Among the most vexing defects that commuter, transit and high-speed rail lines contend with are squat-type defects …
by Jeff Tuzik Some challenges in the railroad industry are local, some are universal. Brazil’s MRS Logística has met its share of both. Their efforts to maintain, modernize, and optimize their network over the past 30 years highlight the importance of approaching all challenges from a system-wide perspective, and of …
by Bob Tuzik, Executive Program Director – Wheel Rail Seminars If there are lessons to be learned from a derailment — and, of course, there are — then Gary Wolf’s The Complete Field Guide to Modern Derailment Investigation is a master class on finding, analyzing, and understanding the marks on …
by Jeff Tuzik Rail corrugation is a common phenomenon. It’s found on both freight and transit lines around the world. The mechanisms …
By Jeff Tuzik This article originally appeared in the July/August issue of Mass Transit. Friction management is a well-established technology in the …
by Jeff Tuzik “Engineers predict things,” said Cory Hogan, Director of Vehicle Dynamics Studies at Ensco Rail Inc. As computing power and …
By Jeff Tuzik Transverse defects are among the most costly and dangerous rail defects that freight railroads contend with. Across all Class …
by Jeff Tuzik Stuart Grassie, Principal, Rail Measurement Ltd and Stuart Grassie Engineering Ltd, is the recipient of the 2024 Worth Award. …
by Jeff Tuzik Rail transit properties around the world all contend with the same general issues. The corrugation on track in San …
by Jeff Tuzik Part 1 of this article focused on past and present research into wheel condition and behavior monitoring via wayside-based …
by Jeff Tuzik The mechanics of wheel/rail interaction are in many ways at the core of railroading and the defining characteristic of …
by Jeff Tuzik Rolling contact fatigue (RCF) affects railroads and transit systems globally. The effects of RCF damage range from poor ride …