[Zurück]

T. Maly, F. Biebl, M. Ostermann:
"The Effects of Weather Conditions and Wheel Wear on Curve Squeal";
Vortrag: 23rd International Congress on Acoustics (ICA 2019), Aachen, Deutschland (eingeladen); 09.09.2019 - 13.09.2019; in: "Proceedings of the ICA 2019 and EAA Euroregio", (2019), ISSN: 2415-1599; 8 S.

The mechanisms of curve squeal generation (lateral stick-slip effect on the top of the rail and/or friction of the wheel flange) are well known. Even if various influencing parameters were already investigated mostly on a theoretical level, in real train operation the parameters are in general not measurable in their entirety and their effects due to the complex interdependencies between them are often not predictable. That is why curve squeal generation often seems to have a random character.
As a continuation of previous studies the aim of the work presented was to investigate the influence of weather condition changes over a whole year and wheel profile parameters changes due to wear on the occurrence frequency of curve squeal. For this, measurements of the pass-by noise emissions and the weather conditions in a narrow curve (radius 230 m) of a Vienna suburban railway line were carried out over a period of 11 months. Due to a previously developed algorithm for automatic detection of curve squealing more than 20000 data sets were available for subsequent statistical analysis. In the paper the dependencies of squeal frequency on rain, air humidity, dew point, and rail temperature, as well as wheel parameters are presented in detail.

Curve Squeal, Weather Conditions, Wheel Wear

Projektleitung Norbert Ostermann:
Einflüsse auf Schallemissionen in Bögen