cqu_85+DS3+DS3.4.pdf (1.15 MB)
Download fileEvaluating the performance of 3-piece bogies on short defects and with unequal wheel diameters
conference contribution
posted on 2017-12-06, 00:00 authored by Colin ColeColin Cole, Mitchell McclanachanMitchell Mcclanachan, Scott SimsonScott Simson, D SkermanSuspension tests on three piece bogies were conducted at the Centre for Railway Engineering Heavy Testing Laboratory. Two 3–piece bogies were tested; both had constant force type friction wedge dampers. One bogie had constant force wedges housed in the bolster. The other bogie had constant force wedges housed in the sideframes. The bogies tested were not reconditioned with wedges half worn or more. Tests were completed using a coal wagon ballasted with scrap steel to simulate a loaded wagon. Track profile inputs were simulated using position controlled hydraulic cylinders. Both bogies were subjected to bounce tests at 3 and 7 Hz and sinusoidal rail profile inputs of wavelengths 3.0 m with simulated vehicle speeds of 40 and 80 kph. Further variation in suspension behaviour was investigated by simulating variations in wheelset wheel diameters. Wheelset diameter mismatches of 24mm were simulated for first and second axles on the bogie. Rail profile magnitudes tested were 24 mm peak to peak.The bounce tests illustrated the inadequacy of the friction damping at resonance. The simulation of rail profile inputs, which resulted in pitch motion of the bogie sideframes resulted in unexpected hysteresis performance. The work demonstrates the limitations of the friction dampers commonly used on freight bogies and highlights the need for more detailed mathematical models in wagon simulation.
Funding
Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)
History
Start Page
49End Page
60Number of Pages
12Start Date
2006-01-01ISBN-10
0858258374Location
Melbourne, Vic.Publisher
Rail Technical Society of AustralasiaPlace of Publication
Melbourne, Vic.Peer Reviewed
- Yes
Open Access
- No
External Author Affiliations
Centre for Railway Engineering; QR National; TBA Research Institute;Era Eligible
- Yes