Abstract
Analysis of the usefulness of distinctive noise features from rail and wheel in assessing their impact on the overall railway noise level
Highlights
The main source of railway noise in the range of speed below 300 kph is the rolling noise, in the lowest quantities of this parameter, below 50 kph the traction noise has to be considered [12]
The main source of the rolling noise are the vibrations caused by the irregularities of the rail and the surface of the wheel
The vibrations of wheels could be connected with their eigenmodes with the dominant concentration of vibration energy in the range of frequencies above 1600 Hz, while the emission of acoustic waves being generated by the rail between 2501250 Hz [12]
Summary
The main source of railway noise in the range of speed below 300 kph is the rolling noise, in the lowest quantities of this parameter, below 50 kph the traction noise has to be considered [12]. One of the currently used PBA (Pass-by Analysis [10]) methods is based on the construction of a transition matrix used to separate the effect of roughness levels (rail and wheel) based on the measurement of rail vibrations and the sound pressure level defined in ISO3095 [21]. An important assumption is the dependence of the transfer function only on the rail and vehicle design and independence from the train speed, levels of roughness and other transition functions. None of the tested methods gave completely satisfactory results, the results confirmed some generally known relationships - the dominance of acoustic energy emissions from the track in the low frequency range, while in the higher frequencies the dominance of noise emissions from the train is enhanced, with these relationships dependent are from train speed. As the basic criterion for the differentiation of both signals, the spectral density of the recorded signal was adopted, looking for features with low variability associated with the track and features with greater variability that can be attributed to passing-by trains
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
