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.
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.
Stuart Grassie discusses rail corrugation, a prevalent issue in rail systems, highlighting advancements in understanding its causes and mitigation strategies over 45 years. Key mechanisms include P2 resonance, trackform-specific resonance, pinned-pinned resonance, and rutting. Successful corrugation management was achieved on Kuala Lumpur’s Kajang Line, marking a significant milestone.
Friction management is a crucial aspect of rail transit, improving wheel/rail interactions by reducing wear, noise, and safety risks. Effective implementation involves tailored strategies based on specific issues. Successful transit agencies employ proper asset management, ensuring consistent results and a strong return on investment through maintenance and optimized practices.
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.
Transverse defects (TDs) pose significant challenges for freight railroads, causing 31% of broken rails. CSX has enhanced its rail grinding program since 2016, reducing non-testable locations by 98% and TD occurrences by 37%. Effective grinding mitigates the risks of TDs, improves ultrasonic detection, and balances defect removal with rail profile maintenance.
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 …
The Delhi Metro Rail Corporation (DMRC) has successfully implemented a rail grinding program to address surface defects like corrugation and rolling contact fatigue. Operating 390 km of track, DMRC’s corrective and preventive measures have improved rail conditions significantly since 2009, leading to reduced wear rates and enhanced wheel/rail dynamics.
The article discusses advancements in wheel condition monitoring technologies, particularly by Mermec and MxV Rail. Various methods, including optical and strain gauge systems, gather data on dynamic forces and out-of-roundness. Enhanced systems promise improved predictions of hunting behavior and overall wheel integrity, increasingly complementing traditional inspection techniques in railways.