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Vehicle/Track

Vehicle Design: Managing Wheel/Rail-Generated Noise and Vibration from the Ground Up (Part 2)

March 31, 2025 | Filed under: Briony Croft, Noise and Vibration, Vehicle Design, Vehicle/Track

By Jeff Tuzik This article was originally published in Mass Transit (June 2024) in conjunction with the annual Wheel/Rail Interaction Rail Transit conference. In part 1 of this article, a group of experts, including a transit operator, three vehicle manufacturers, and a noise and vibration consultant, examined how to mitigate wheel/rail-generated noise at the …

Vehicle Design: Managing Wheel/Rail-Generated Noise and Vibration from the Ground Up (Part 1)

March 31, 2025 | Filed under: Noise and Vibration, Vehicle Design, Vehicle/Track

The article discusses the challenges of vibration and noise in rail transit operations, emphasizing the importance of vehicle design and technology in mitigating these issues. Key design factors, such as unsprung mass and suspension characteristics, significantly impact performance. Strategies from experts and case studies highlight the complexities of optimizing vehicles for noise and vibration control.

Vehicle/Track Interaction from a Car Design Perspective

November 3, 2024 | Filed under: Vehicle Design, Vehicle/Track, WRI Conference

Jonathan Sunde from Strato, Inc. emphasized at the Wheel Rail Seminars that wheel/rail dynamics are critically influenced by car and coupler designs. As curves become sharper, swingout distances increase, affecting clearance and coupling performance. The AAR standards guide design choices to minimize risks of buff and draft failures, ensuring safe operations in diverse freight conditions.

Examining the Role of Wheel/Rail Interaction in a Unit Train Derailment

October 30, 2024 | Filed under: Derailment, Heavy Haul, Vehicle/Track, Wheel/Rail Interaction

George Fowler, a veteran investigator, analyzed the 2016 Grey derailment involving a Canadian National train, highlighting that derailments often stem from combined vehicle and track factors. His investigation revealed issues like track geometry, maintenance, and vehicle dynamics, emphasizing the importance of thorough evaluations to prevent such incidents in the future.

Using Digital Twin Simulations of Automated In-Train & Vehicle/Track Dynamics to Reduce Derailment Risks

August 10, 2024 | Filed under: Big Data, Derailment, Vehicle/Track, WRI Conference

Cory Hogan, Director of Vehicle Dynamics at Ensco Rail, highlights the use of digital twins in predicting rail system issues before they occur. Ensco employs advanced simulations and data collection to model vehicle dynamics, enhance safety, and streamline railroad operations, aiming to develop increasingly sophisticated and accurate digital twins for rail networks.

New Approaches to Dynamic Wheel Force Measurement – Part 1

March 29, 2024 | Filed under: Measurement Systems, Vehicle/Track, Wheel/Rail Interaction, WRI Conference

The article discusses the significance of wheel/rail interaction in railroading, emphasizing the importance of both wheels and tracks. Advances in monitoring technologies, such as continuous wheel condition monitoring and load detectors, enhance safety and maintenance. It highlights challenges and improvements in measuring forces effectively, contributing to efficient railroad operations.

Measuring and Designing Rate of Change in Track Alignment

November 24, 2023 | Filed under: Rail Maintenance, Track Geometry, Vehicle/Track, WRI Conference

by Jeff Tuzik In order to solve a problem, you have to be able to measure it. And while there are generally no new problems in railroading, tools and techniques of measurement continue to evolve. Over the years, engineers at the Union Pacific Railroad have noticed a deficit in traditional …

Sound Transit Studies Wheel/Rail Interaction Differences Between Vehicle Types

April 23, 2023 | Filed under: Rail Transit, Vehicle/Track, Wheel Maintenance, Wheel/Rail Interaction

by Jeff Tuzik Seattle’s Link Light Rail, operated by Sound Transit, is a fairly young system. And by most standards, a small system. But it’s also a sophisticated system, and it’s growing fast. The system currently operates 25 miles of track and is in the midst of expanding to 50 …

Running Longer Trains More Productively and Less Destructively

March 12, 2020 | Filed under: Heavy Haul, Vehicle/Track

by David C. Lester Dave Peltz is literally a rocket scientist. Although he is now Chief of Global Technology for GE Transportation’s (now Wabtec’s) Intelligent Control Systems Division in Melbourne, Fla., he spent time with the U.S. Air Force as a satellite communications systems engineer for the Mill Star satellite …

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 …

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