ROLLING NOISE REDUCTION BY USING WHEEL DAMPERS

The priority, given today to the research of railway traffic noise, depends on always more strict standards of environment, with the introduction of high-speed trains and with requirements on more environment friendly goods transport. Very important noise source that affects the environment is wheel-rail contact. Rolling noise is caused by vibration of structures of wheels and rail. These noises and vibrations are initiated mainly by shape unevenness (roughness) of both contact surfaces at the point of contact. The reduction of the wheel acoustic energy can be achieved by optimising the wheel design or using vibration and noise absorbers. The absorber significantly contributes to reducing noise of the wheel. The precise analysis provides detection and identification of noise and vibration sources and thereby their reduction as well. Theoretical study of this problem, the procedure of measurement and analysis and demonstration of real experimental measurement of acoustic-vibration parameters by various types of rail wheels is demonstrated. For the covering abstract see ITRD E123761.