Aerodynamic Noise Reduction in Pantographs by Shape-smoothing of the Panhead and Its Support and by Use of Porous Material in Surface Coverings

Ikeda, Mitsuru; Mitsumoji, Takeshi; Sueki, Takeshi; Takaishi, Takehisa

doi:10.2219/rtriqr.51.220

Cited by 20 publications

(13 citation statements)

References 4 publications

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“…On a modern single-arm pantograph, the panhead is one of the main noise sources as it has a relatively large projected area which is exposed directly to the incoming flow [91]. Moreover, it has a significant influence on the lift force characteristics of the pantograph which are important to maintain contact with the catenary.…”

Section: Optimised Panhead Shapementioning

confidence: 99%

“…With the currently used panhead, the improved support was found to generate more noise than the existing design but in combination with the shape-optimised panhead the improved support gave a benefit. More details are given in Reference [91] which summarises the design of a prototype low-noise pantograph combining a number of techniques. To prevent Aeolian tones, 20 through holes of diameter 6 mm were included in the panhead design [91].…”

Section: Optimised Panhead Shapementioning

confidence: 99%

“…More details are given in Reference [91] which summarises the design of a prototype low-noise pantograph combining a number of techniques. To prevent Aeolian tones, 20 through holes of diameter 6 mm were included in the panhead design [91]. In wind tunnel tests, the new combined panhead and support led to a noise reduction of about 4 dB over the whole frequency range [91].…”

Section: Optimised Panhead Shapementioning

confidence: 99%

“…To prevent Aeolian tones, 20 through holes of diameter 6 mm were included in the panhead design [91]. In wind tunnel tests, the new combined panhead and support led to a noise reduction of about 4 dB over the whole frequency range [91].…”

Section: Optimised Panhead Shapementioning

confidence: 99%

See 3 more Smart Citations

Recent developments in the prediction and control of aerodynamic noise from high-speed trains

Thompson

Iglesias

Liu

et al. 2015

International Journal of Rail Transportation

125

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At speeds above 300-350 km/h, the main source of noise from trains is the aerodynamic noise caused by the air flow over the train structure. The sound level increases with train speed at a rate of between 60 and 80 times the logarithm of the speed so that, as speeds increase further, the noise increases dramatically. The main aerodynamic noise is produced by the air flow passing over the pantograph, the train nose, the bogie region and cavities such as the pantograph recess and the inter-coach gap. Experimental and numerical methods for studying aerodynamic noise are reviewed including the use of microphone arrays, wind tunnels, computational fluid dynamics and semi-empirical methods. Potential mitigation measures that can control aerodynamic noise are also reviewed.

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Section: Optimised Panhead Shapementioning

confidence: 99%

Section: Optimised Panhead Shapementioning

confidence: 99%

Section: Optimised Panhead Shapementioning

confidence: 99%

Section: Optimised Panhead Shapementioning

confidence: 99%

See 2 more Smart Citations

Recent developments in the prediction and control of aerodynamic noise from high-speed trains

Thompson

Iglesias

Liu

et al. 2015

International Journal of Rail Transportation

125

View full text Add to dashboard Cite

show abstract

“…(Fig. 3) [3]. In addition, basic research is also being conducted on new measures [4,5,6] using flow field control technologies, such as synthetic jet actuators, plasma actuators, etc.…”

Section: Shinkansen Noisementioning

confidence: 99%