Triennial Report 2003 - CHARMEC

Parallel EU projects – Parallella EU-projekt – Parallele EU-Projekte – Projets parallèles avec l’UEEU1. EUROSABOTEuroSABOT – Sound attenuation by optimised tread brakesSchallverminderung durch optimierte KlotzbremsenAtténuation du bruit par l’optimisation des freins à sabotFor photo of Roger Lundén,see page 49Eurosabot had overall a budgeted project cost ofkeuro 3724 and a budgeted eu funding of keuro 1858.Chalmers/charmec’s share of the eu funding waskeuro 164 and our commitment to the project was13 man-months. Eurosabot ran between 1 March 1996and 31 August 1999. The project was coordinated byaea Technology Rail bv (Paul de Vos).Tread braked railway vehicles radiate high rollingsound caused by the brake blocks generating roughness(waviness, corrugation) on the wheel tread, which inducesvibrations and noise. The objective of Eurosabotand the eu1 project was to develop new and better brakeblocks that cause less roughness on the wheel tread thanthe cast-iron blocks used previously. charmec’s workwas carried out in close collaboration with the vb2 project.A great deal of experimental work was done in thebrake rig (inertia dynamometer) at Surahammar whereHans Johansson assisted.Professor Roger Lundén led the eu1 project. Seefurther the charmec Triennial Report from Stage 2.Mr Hans Johansson, Technicianof Chalmers AppliedMechanics, at the braketest rig in Surahammar.Photo taken 2000. DuringStage 3 Hans Johanssonhas contributed to projectsTS5 and SD4Parallel EU projects – Parallella EU-projekt – Parallele EU-Projekte – Projets parallèles avec l’UEEU2. SILENT FREIGHTSilent Freight – Development of new technologies for low noisefreight wagonsEntwicklung neuer Technologien für leise GüterwagenDéveloppement de nouvelles technologies pour des wagonsdes marchandises silencieuxFor photo of Jens Nielsen,see page 19Silent Freight had overall a budgeted project cost ofkeuro 3196 and a budgeted eu funding of keuro 1700.Chalmers/charmec’s share of the eu funding waskeuro 91 and our commitment to the project was 17man-months. Silent Freight ran between 1 Febuary 1996and 31 December 1999. The project was coordinatedby erri (William Bird).The objective of Silent Freight and the eu2 projectwas a reduction of the noise level from the rolling stockused in freight traffic by 10 dB(A). charmec’s contributionaimed at investigating whether a proposal putforward by us for a standard wheel with a perforatedwheel disc could be a cost-effective solution and applicableon existing types of freight wagon wheels.The sound radiation from prototypes of perforatedwheels was calculated by means of the commercialsysnoise computer program and was measured in thetest rig at Surahammar. The outcome of the eu2 projectwas that acoustic short-circuiting (between the front andrear sides of the vibrating wheel disc) via suitable holesis an effective method in the frequency range up to ca1000 Hz. A prototype wheelset manufactured by AdtranzWheelset (now Lucchini Sweden) was used in the finalfield tests at Velim in the Czech Republic in May/June1999.Docent Jens Nielsenled the eu2 project. Seefurther the charmecTriennial Reportfrom Stage 2.52