Noise-source identification of a high-speed train by noise source level analysis

Noh, Hee-Min

doi:10.1177/0954409716640310

Cited by 14 publications

(13 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When studying the far-field noise caused by train operation [4], the rail is usually simplified as a line sound source [5], and the noise radiated in the far field is considered to be consistent with the superposition effect of various individual noise sources in the far field [6]. However, when describing the near-field noise, due to the diversity of the noise sources [7], the propagation characteristics are usually more complex and difficult to be predicted through a simple sound source model. When a train is running at a high speed, the noise sources [8] in the near-field area of the wheel-rail system mainly include the wheelrail rolling noise and aerodynamic noise.…”

Section: Introductionmentioning

confidence: 99%

Multi-Source Coupling Based Analysis of the Acoustic Radiation Characteristics of the Wheel–Rail Region of High-Speed Railways

Gao

Wang

2021

Entropy

View full text Add to dashboard Cite

Based on elastic mechanics, the fluid–structure coupling theory and the finite element method, a high-speed railway wheel-rail rolling-aerodynamic noise model is established to realize the combined simulation and prediction of the vibrations, rolling noise and aerodynamic noise in wheel-rail systems. The field test data of the Beijing–Shenyang line are considered to verify the model reliability. In addition, the directivity of each sound source at different frequencies is analyzed. Based on this analysis, noise reduction measures are proposed. At a low frequency of 300 Hz, the wheel-rail area mainly contributes to the aerodynamic noise, and as the frequency increases, the wheel-rail rolling noise becomes dominant. When the frequency is less than 1000 Hz, the radiated noise fluctuates around the cylindrical surface, and the directivity of the sound is ambiguous. When the frequency is in the middle- and high-frequency bands, exceeding 1000 Hz, both the rolling and total noise exhibit a notable directivity in the directions of 20–30° and 70–90°, and thus, noise reduction measures can be implemented in these directions.

show abstract

Section: Introductionmentioning

confidence: 99%

Multi-Source Coupling Based Analysis of the Acoustic Radiation Characteristics of the Wheel–Rail Region of High-Speed Railways

Gao

Wang

2021

Entropy

View full text Add to dashboard Cite

show abstract

“…7 In addition, because the analysis of the microphone array system is performed based on the beam power value, the array is limited in its ability to analyze the influence of the actual sound pressure of the pantograph. 8 In order to investigate the effect of noise from the pantographs of high-speed railway vehicles, studies using wind tunnel tests were widely used. 9,10 In those studies, noise sources and characteristics generated from a small-scale pantograph model were identified through sound field visualization using a microphone array.…”

Section: Introductionmentioning

confidence: 99%

Wind tunnel test analysis to determine pantograph noise contribution on a high-speed train

Noh

2019

Advances in Mechanical Engineering

Self Cite

View full text Add to dashboard Cite

In this study, we investigated the characteristics and the influence of the aero-acoustic noise generated from a pantograph using various experimental approaches in a wind tunnel. First, the noise generated at various flow velocities was measured and analyzed using a full-scale pantograph model. Then, the noise generated from the main position of the pantograph was derived using a microphone array attached to one side of a wind tunnel. The noise contributions of the main components of the pantograph were derived from the noise measurements obtained from a step-by-step disassembly of the full-scale model. In addition, the noise reduction achieved by panhead collectors, which are some of the most important noise sources on a pantograph, was examined by studying the results obtained when varying their geometry. In order to analyze the noise-reduction effect achieved by varying the height of the collector, different types of collectors were fabricated and wind tunnel tests were conducted. Through this study, we have investigated the aero-acoustic noise contribution of the major components of a pantograph, and we have developed effective noise-reduction measures for the panhead collector.

show abstract

“…He et al [8] investigated the external noise of a highspeed train at different speeds and found that the rolling noise has a greater contribution to the total noise than the aerodynamic noise. Noh [9] used a microphone array to identify the noise sources of a high-speed train and found that the main noise sources are the intercoach spacing, wheels, and pantograph, when the train is running at 390 km/h. e different conclusions are related to the different vehicle types, track types, and train speeds in their studies.…”

Section: Introductionmentioning

confidence: 99%

Source Contribution Analysis for Exterior Noise of a High‐Speed Train: Experiments and Simulations

Zhang

Xiao

Wang

et al. 2018

Shock and Vibration

View full text Add to dashboard Cite

is paper presents a detailed investigation into the contributions of different sound sources to the exterior noise of a high-speed train both experimentally and by simulations. e in situ exterior noise measurements of the high-speed train, including pass-by noise and noise source identification, are carried out on a viaduct. Pass-by noise characteristics, noise source localizations, noise source contributions of different regions, and noise source vertical distributions are considered in the data analysis, and it is shown how they are affected by the train speed. An exterior noise simulation model of the high-speed train is established based on the method of ray acoustics, and the inputs come from the array measurements. e predicted results are generally in good agreement with the measurements. e results show that for the high-speed train investigated in this paper, the sources with the highest levels are located at bogie and pantograph regions. e contributions of the noise sources in the carbody region on the pass-by noise increase with an increasing distance, while those in the bogie and train head decrease. e source contribution rates of the bogie and the lower region decrease with increasing train speed, while those of the coach centre increase. At a distance of 25 m, the effect of the different sound sources control on the pass-by noise is analysed, namely, the lower region, bogie, coach centre, roof region, and pantograph. is study can provide a basis for exterior noise control of high-speed trains.

show abstract

Noise-source identification of a high-speed train by noise source level analysis

Cited by 14 publications

References 19 publications

Multi-Source Coupling Based Analysis of the Acoustic Radiation Characteristics of the Wheel–Rail Region of High-Speed Railways

Multi-Source Coupling Based Analysis of the Acoustic Radiation Characteristics of the Wheel–Rail Region of High-Speed Railways

Wind tunnel test analysis to determine pantograph noise contribution on a high-speed train

Source Contribution Analysis for Exterior Noise of a High‐Speed Train: Experiments and Simulations

Contact Info

Product

Resources

About