Technical Reports

Improved Roller Bearing Wayside Detection Research: Phase III System Evaluation Test

  • 24
  • Jul
  • 2000
AUTHOR: Gerald B. Anderson, James E. Cline, Richard L. Smith
SUBJECT: Evaluation
KEYWORDS: Wayside Acoustic Bearing Detection, Roller Bearing Defects, Raceway Spalls, Water Etching, Loose Bearings Components, Spun Cones
ABSTRACT: TTCI conducted a series of simulated revenue service tests with a train of 8 cars containing wheel sets with specific roller bearing defects and wheel sets with good bearings. The purpose of the test was the evaluation of improved wayside acoustic bearing detection systems. The tests were conducted at the Transportation Technology Center in July 1999. The only supplier of a prototype ABD system for evaluation was TTCI, although several other suppliers participated by collecting onboard or wayside data, which may lead to other developments. The ABD was developed under the auspices of AAR’s Track Performance Monitoring Strategic Initiative, funded by AAR’s member railroads. The bearing defect types tested include raceway spalls (inner and outer ring, AAR condemnable and/or repairable), roller defects, water etching, and loose backing rings, inner ring back face wear, and loose inner rings (spun cones). This report describes the test methodology and presents a general evaluation of the state of acoustic bearing detection based on the proprietary TTCI detector. The test was conducted as a blind test, with bearing defect types and locations unknown to the participants. Results were determined based on the blind test concept using expert knowledge. Subsequently, the defect types and location were revealed and an expert system model was made using that information. Both results are presented in this report.