Effect of multi-layered IIR/EP on noise reduction of aluminium extrusions for high-speed trains

2021 ◽  
Vol 262 ◽  
pp. 113638
Author(s):  
Jie Zhang ◽  
Dan Yao ◽  
Menglu Shen ◽  
Ruiqian Wang ◽  
Jiang Li ◽  
...  
Keyword(s):  
Noise Reduction ◽  
High Speed ◽  
High Speed Trains

Design of noise-reduction seats for high-speed trains

2017 ◽  
Vol 13 (3) ◽  
pp. 385-389
Author(s):  
Xiaojun Deng ◽  
Yanju Zhao ◽  
Haijin Zhang ◽  
Renzhong Shuai ◽  
Leiwei Zhu
Keyword(s):  
Noise Reduction ◽  
High Speed ◽  
High Speed Trains

scholarly journals Complexity Simulation on Application of Asymmetric Bionic Cross-Section Rod in Pantographs of High-Speed Trains

Complexity ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Yan Cao ◽  
Yu Bai ◽  
Qiangfeng Wang
Keyword(s):  
Noise Reduction ◽  
Porous Materials ◽  
Cross Section ◽  
High Speed ◽  
Aerodynamic Resistance ◽  
Aerodynamic Noise ◽  
Practical Application ◽  
Bionic Design ◽  
High Speed Trains ◽  
Bionic Structure

Ground transportation means and aircrafts with high-speed running are composed of many rod components. Aerodynamic noise generated therefrom is very outstanding. Reduction of the aerodynamic noise of rods becomes a hot topic in recent years. Most reported studies are tentative researches on aerodynamic noise of a pantograph or involve noise reduction of the pantograph with using porous materials or reshaping rod surfaces. Through using porous materials and reshaping rod surface, the aerodynamic noise of pantograph can be reduced to a certain extent, but the aerodynamic resistance will be increased and it is not convenient for practical application in engineering. Regarding this situation, the paper explores noise reduction performance of a feather on the back of a carrier pigeon and conducts the bionic design on rod surface. Through numerical simulation, the paper researches noise reduction performance of the bionic structure on the rod surface, reveals the mechanism of bionic noise reduction, and explores noise reduction effects of bionic structural rods on pantographs of the high-speed trains.

Improving the noise reduction performance of gangway bellows by using multilayered structures

2021 ◽  
pp. 095440972098562
Author(s):  
Hee-Min Noh
Keyword(s):  
Noise Reduction ◽  
Silicone Rubber ◽  
High Speed ◽  
Low Frequency ◽  
Interior Noise ◽  
Frequency Noise ◽  
Multilayered Structures ◽  
Interior Space ◽  
High Speed Trains ◽  
Verification Test

Excessive interior noise in railway vehicles is a major cause of fatigue and discomfort for passengers. In particular, the between-cars sections of high-speed trains experience considerable interior noise due to the poor noise reduction performance of the bellows, which are primarily made of silicone rubber and thus have a lower density than that of other components, made of extruded aluminum. Therefore, the objective of this study was to improve the noise reduction performance of such bellows. First, the material properties of silicone rubber were analyzed. Based on the results, the noise transmission of a simple model was analyzed to determine approaches required to reduce the low-frequency interior noise of the between-cars sections. It was confirmed that the low-frequency noise could be reduced by incorporating a multilayered panel of silicone rubber. Therefore, multilayered structures were considered for incorporation in the interior space of the between-cars sections of an actual high-speed train. A curved driving simulation of the between-cars sections indicated that no interference occurs when applying the proposed approach. Furthermore, a comparative test regarding the noise reduction performance was conducted considering cases involving bellows with and without multiple layers. The results of the verification test demonstrated that the noise reduction performance when using the proposed approach was improved by 4 dB compared with that in the case involving the conventional bellows, and an improvement of 8 dB or more was observed for noise with a low-frequency of 100 Hz.

A study of noise reduction in carriages of high speed trains : First report:Sound source search and model test of aerodynamic noise

2004 ◽  
Vol 2004.42 (0) ◽  
pp. 151-152
Author(s):  
Dai TATEISHI ◽  
Masaharu NISHIMURA ◽  
Tomonobu GOTO ◽  
Masamitsu MORIOKA ◽  
Masahiro SUGESAWA ◽  
...  
Keyword(s):  
Noise Reduction ◽  
Model Test ◽  
High Speed ◽  
Aerodynamic Noise ◽  
High Speed Trains

S0505-2-3 Development of Noise Reduction Techniques for Shinkansen High-speed Trains

2009 ◽  
Vol 2009.2 (0) ◽  
pp. 253-254
Author(s):  
Takeshi KURITA ◽  
Yusuke WAKABAYASHI ◽  
Fumio MIZUSHIMA ◽  
Nobuhiro YAMAZAKI ◽  
Haruo YAMADA ◽  
...  
Keyword(s):  
Noise Reduction ◽  
High Speed ◽  
Reduction Techniques ◽  
High Speed Trains
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