Noise and vibration control on railway tracks
Müller-BBM is also engaged in predicting noise and vibration, e.g. on bridges or track superstructures. If excessive vibration can be expected in these locations, then vibration control systems such as mass spring systems are utilized. We will support you when predicting the efficacy and design of protective measures. The dimensioning of suitable noise control measures on railway tracks also forms part of our remit.
Rail roughness measurements: m|rail
The rolling noise of rail vehicles is determined by the roughness of the rails and of the wheels. The comparability of various measurement locations must be established, especially when it comes to acoustic acceptance measurements for moving trains. For this purpose, the rail roughness must be known. The measurement of rail and wheel roughness places exacting demands on the precision of measuring instruments. Unevenness in a range of less than one micrometre must be registered reliably. For this purpose, Müller-BBM has developed the highly precise and robust m|rail measuring instrument that satisfies this requirement even under rough service conditions.
Rolling noise and vibration predictions
Railway engineering does not stop at the vehicle. The railway system also includes the tracks, the ongoing development of which requires evaluation and attention from an acoustic aspect. In collaboration with Deutsche Bahn AG, Müller-BBM has developed a wheel/rail impedance model (RIM), in which the noise propagation from passing trains by excitation of the running surface roughness can be calculated. The RIM further distinguishes itself by its enhanced facility in calculating the vibration excitation and propagation.