Identification of the Major Noise Energy Sources in Rail Vehicles Moving at a Speed of 200 km/h

Abstract

In this work, the problematic identification of the main sources of noise occurring from the exploitation of railway vehicles moving at a speed of 200 km/h were analyzed. Within the conducted experimental research, the testing fields were appointed, measurement apparatus selected, and a methodology for conducting measurements was defined, including the assessment of noise on a curve and straight track for electric multiple units of the so-called Pendolino, an Alstom type ETR610 series ED25 train. The measurements were made using a microphone camera Bionic S-112 at a distance of 22 m from the track axis. As a result of the conducted experimental research, it was indicated that the noise resulting from vibrations arising at the wheel-rail contact (rolling noise) was the dominant source of sound.

Acoustic Signature and Impact of High-Speed Railway Vehicles in the Vicinity of Transport Routes

“…The registration of acoustic events from high-speed railway vehicles was made with the use of measurement apparatus, consisting of the following devices: Detailed information concerning e.g., location of the testing ground, weather conditions, is described in the publications [2,3].…”

“…There were two sections of a railway track selected for the purpose of the mental research (straight section and curved section), located on the railway li Grodzisk Mazowiecki-Zawiercie (Central Trunk Line-CMK), section Grodz zowiecki-Idzikowice, which is an electrified and mostly double-track line, with m design speed of 250 km/h (Figure 2) [22]. Details of the study sites are described others, in [2]. Normal-gauge vehicles (suitable for operation on tracks with a gauge of 1435 mm) are equipped with eight asynchronous, three-phase traction motors with a power of 708 kW each.…”

“…4 Grodzisk Mazowiecki-Zawiercie (Central Trunk Line-CMK), section Grodzisk Mazowiecki-Idzikowice, which is an electrified and mostly double-track line, with maximum design speed of 250 km/h (Figure 2) [22]. Details of the study sites are described, among others, in [2].…”

“…Almost 22 million people are exposed to noise intensity of at least 55 dB during the day-evening-night period and about 16 million people to noise at night (of intensity of minimum 50 dB). The scale of this phenomenon is influenced by a number of factors, including the technical condition of the railway superstructure and rolling stock, landforms and land use, and the high speed of railway vehicles [2,3].…”

Application of omnidirectional sound-source localization system for high portability and three-dimensional sound field recording

“…The conventional technologies for solving these problems have three issues. First, microphone arrays with microphones placed on a plane surface are used for sound-source localization to locate sound sources [3]. However, the number of microphones in the array or the array size generally needs to be increased to perform highly accurate sound-source localization.…”