The ventilated brake discs currently used in passenger trains can be replaced with solid discs when drag braking of long duration need not be designed for. This is a conclusion arrived at in the present study where transient temperatures and stresses induced in the disc during drag braking and during single and repeated stop braking are calculated by use of a previously established analytical model. The results are verified through full-scale experiments carried out on a recently built inertia dynamometer. A forged solid steel disc is compared with a standard ventilated cast iron disc. Measurement techniques and various observations are discussed.
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References
1.
Power limits of the disc brake. Office for Research and Experiments of the International Union of Railways, Utrecht, April 1985, report B 126/RP 9/E, 114 pp.
2.
Study of the braking distance of passenger trains for speeds of 200 to 300 km/h. Office for Research and Experiments of the International Union of Railways, Utrecht, May 1988, report B 126/RP S13/E, 40 pp.
3.
RusselD. F.WilliamsA. J.The design and development of a brake disc for high-speed trains, Proc. Instn Mech. Engrs, J. Rail and Rapid Transit, Part F, 1990, 205, 133–139.
4.
SaumweberS.GerumE.BerndtP.Grundlagen der Schienenfahrzeugbremse, 1990, 111 pp (Hestra-Verlag, Darmstadt).
5.
DikeG.Temperature distribution in disc brakes. Machine Element Division, Lund Technical University, Lund, Sweden, 1976, 59 pp.
6.
DikeG.Stresses and cracks in brake discs. Machine Element Division, Lund Technical University, Lund, Sweden, 1976, 57 pp.
ThomsE.Disc brakes for heavy vehicles. IMechE Conference on Disc brakes for commercial vehicles, 1988, Conference publication 1988–10, paper C464/88, pp. 133–137.
9.
Comparative tests with disc brakes on 14 full-scale dynamometers. Office for Research and Experiments of the International Union of Railways, Utrecht, September 1983, report B 126/RP 8/E, 69 pp.
10.
FermérM.LundénR.Transient brake temperatures found by use of analytical solutions for finite hollow cylinders. Proc. Instn Mech Engrs, J. Mech. Engng Sci., Part C, 1991, 205, 189–200.
11.
NewcombT. P.Thermal aspects of railway braking. IMechE International Conference on Railway braking, 1979, Conference publication 1979–11, pp. 7–14 (Mechanical Engineering Publications, London).
12.
Brakes—disc brakes and disc brake linings (1). In Transport stock, 3rd edition, Vol. V, 1985, 58 pp, UIC code 541–3 OR (International Union of Railways).
