scholarly journals Nose Shape Optimization of High-speed Train for Minimization of Tunnel Sonic Boom.

2001 ◽  
Vol 44 (3) ◽  
pp. 890-899 ◽  
Author(s):  
Hyeok-bin KWON ◽  
Ki-hyeok JANG ◽  
Yu-shin KIM ◽  
Kwan-jung YEE ◽  
Dong-ho LEE
Keyword(s):  
Shape Optimization ◽  
High Speed ◽  
Sonic Boom ◽  
High Speed Train ◽  
Nose Shape

PREDICTION AND VALIDATION ON THE SONIC BOOM BY A HIGH-SPEED TRAIN ENTERING A TUNNEL

2001 ◽  
Vol 247 (2) ◽  
pp. 195-211 ◽  
Author(s):  
T.S. YOON ◽  
S. LEE ◽  
J.H. HWANG ◽  
D.H. LEE
Keyword(s):  
High Speed ◽  
Sonic Boom ◽  
High Speed Train

Shape Optimization of High-Speed Train Pantograph Insulators for Low Aerodynamic Noise

2012 ◽  
Vol 249-250 ◽  
pp. 646-651
Author(s):  
Xiao Yan Yang ◽  
You Gang Xiao ◽  
Yu Shi
Keyword(s):  
Shape Optimization ◽  
Sound Pressure Level ◽  
High Speed ◽  
Sound Pressure ◽  
Pressure Level ◽  
Aerodynamic Noise ◽  
High Speed Train ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Elliptical Section

With large eddy simulation(LES) and Lighthill-Curle acoustic theory, the aerodynamic noises radiated from pantograph insulators with rectangular, circular, elliptical section were calculated, and the optimal pantograph insulator shape was obtained. The results show that in the same model, the sound pressure level (SPL) spectrum at different monitoring points are basically the same, but the amplitude is different. In different models, the SPL spectrum are different. As for rectangular, circular, elliptical section insulators, the frequency with maximum SPL reduces gradually. For reducing aerodynamic noise, the elliptical section insulator is optimal, and the long elliptical axis should be consistent with air flow. The pantograph with bigger and less components is helpful to reduce the aerodynamic noise.

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