We aim to perform a series of field measurements for high-speed railway tunnels in China to obtain the micropressure wave (MPW) at the tunnel exit and the transient pressures near the tunnel portals. The relationship between the MPW and the nose-entry wave and the effects of train speed and the tunnel exit hole on the MPW are analyzed. The results show that the MPW decreases with increasing distance from the tunnel exit, but increases rapidly with increasing train speeds. Additionally, holes in the hoods near the tunnel exit could decrease the MPW near the tunnel exit by 10–20%.

References

References
1.
Vardy
,
A. E.
,
2008
, “
Generation and Alleviation of Sonic Booms From Rail Tunnels
,”
Proc. Inst. Civ. Eng.: Eng. Comput. Mech.
,
161
(
3
), pp.
107
119
.
2.
Howe
,
M. S.
,
Iidab
,
M.
,
Maedab
,
T.
, and
Sakumab
,
Y.
,
2006
, “
Rapid Calculation of the Compression Wave Generated by a Train Entering a Tunnel With a Vented Hood
,”
J. Sound Vib
,
297
(
1–2
), pp.
267
292
.
3.
Liu
,
F.
,
Yao
,
S.
,
Zhang
,
J.
, and
Wang
,
Y. Q.
,
2018
, “
Field Measurements of Aerodynamic Pressures in High-Speed Railway Tunnels
,”
Tunnelling Underground Space Technol.
,
72
, pp.
97
106
.
4.
Howe
,
M. S.
,
1999
, “
Theory of the Compression Wave Generated When a High-Speed Train Enters a Tunnel
,”
Proc. Inst. Mech. Eng. Part F
,
213
, pp.
89
104
.
5.
Choi
,
J.
, and
Kim
,
K.
,
2014
, “
Effects of Nose Shape and Tunnel Cross-Sectional Area on Aerodynamic Drag of Train Travelling in Tunnels
,”
Tunnelling Underground Space Technol.
,
41
, pp.
62
73
.
6.
Kikuchi
,
K.
,
Iida
,
M.
, and
Fukuda
,
T.
,
2011
, “
Optimization of Train Nose Shape for Reducing Micro-Pressure Wave Radiated From Tunnel Exit
,”
J. Low Freq. Noise Vib. Act. Control
,
30
(
1
), pp.
1
19
.
7.
Uystepruyst
,
D.
,
William-Louis
,
M.
, and
Monnoyer
,
F.
,
2013
, “
3D Numerical Design of Tunnel Hood
,”
Tunnelling Underground Space Technol.
,
38
, pp.
517
525
.
8.
Liu
,
T. H.
,
Tian
,
H. Q.
, and
Liang
,
X. F.
,
2010
, “
Design and Optimization of Tunnel Hoods
,”
Tunn. Undergr. Sp. Tech
,
25
(
3
), pp.
212
219
.
9.
Murray
,
P. R.
, and
Howe
,
M. S.
,
2010
, “
Influence of Hood Geometry on the Compression Wave Generated by a High-Speed Train
,”
J. Sound Vib.
,
329
(
14
), pp.
2915
2927
.
10.
Wang
,
H. L.
,
Lei
,
B.
,
Bi
,
H. Q.
, and
Yu
,
T.
,
2018
, “
Wavefront Evolution of Compression Waves Propagating in High Speed Railway Tunnels
,”
J. Sound Vib
,
431
, pp.
105
121
.
11.
Fukuda
,
T.
,
Ozawa
,
S.
,
Iida
,
M.
,
Takasaki
,
T.
, and
Wakabayashi
,
Y.
,
2006
, “
Distortion of Compression Wave Propagating Through Very Long Tunnel With Slab Tracks
,”
JSME Int. J
,
49
(
4
), pp.
1156
1164
.
12.
Yoon
,
T. S.
,
Lee
,
S.
,
Hwang
,
J. H.
, and
Lee
,
D. H.
,
2001
, “
Prediction and Validation on the Sonic Boom by a High-Speed Train Entering a Tunnel
,”
J. Sound Vib.
,
247
(
2
), pp.
195
211
.
13.
Miyachi
,
T.
,
Fukuda
,
T.
, and
Saito
,
S.
,
2014
, “
Model Experiment and Analysis of Pressure Waves Emitted From Portals of a Tunnel With a Branch
,”
J. Sound Vib.
,
333
(
23
), pp.
6156
6169
.
14.
Liu
,
F.
,
Yao
,
S.
,
Yang
,
M. Z.
, and
Zhang
,
J.
,
2015
, “
Analysis on Aerodynamic Effect of High-Speed Train Passing Tunnel With Lining Structure
,”
J. Cent. South Univ.
,
46
(11), pp.
4363
4369
.http://www.zndxzk.com.cn/paper/paperView.aspx?id=paper_310621
15.
Liu
,
F.
,
Yao
,
S.
,
Zhang
,
J.
, and
Zhang
,
Y. B.
,
2016
, “
Effect of Increased Linings on Micro-Pressure Waves in a High-Speed Railway Tunnel
,”
Tunnelling Underground Space Technol.
,
52
, pp.
62
70
.
16.
Baron
,
A.
,
Molteni
,
P.
, and
Vigevano
,
L.
,
2006
, “
High-Speed Trains: Prediction of Micro-Pressure Wave Radiation From Tunnel Portals
,”
J. Sound Vib.
,
296
(
1–2
), pp.
59
72
.
17.
Miyachi
,
T.
,
2017
, “
Acoustic Model of Micro-Pressure Wave Emission From a High-Speed Train Tunnel
,”
J. Sound Vib.
,
391
, pp.
127
152
.
18.
Yang
,
M. Z.
,
Tian
,
H. Q.
, and
Yuan
,
X. X.
,
2015
, “
A New Calculation Method for Micro-Pressure Waves Induced by High-Speed Train Passing Through Long Tunnels
,”
Prog. Comput. Fluid Dyn.
,
15
(
5
), pp.
269
278
.
19.
Xiang
,
X. T.
,
Xue
,
L. P.
, and
Wang
,
B. L.
,
2015
, “
Aerodynamic Effects of Unvented Hoods on the Initial Compression Wave Generated by a High-Speed Train Entering a Tunnel
,”
ASME J. Fluids Eng.
,
138
(
3
), p.
031102
.
20.
Zhang
,
L.
,
Liu
,
H.
,
Norbert
,
S.
, and
Kerstin
,
T.
,
2017
, “
Influence of Tunnel Aerodynamic Effects by Slope of Equal-Transect Ring Oblique Tunnel Portal
,”
J. Wind Eng. Ind. Aerodyn.
,
169
, pp.
106
116
.
21.
Wang
,
H. L.
,
Vardy
,
A. E.
, and
Pokrajac
,
D.
,
2015
, “
Perforated Exit Regions for the Reduction of Micro-Pressure Waves From Tunnels
,”
J. Wind Eng. Ind. Aerodyn.
,
146
, pp.
139
149
.
22.
Tebbutt
,
J. A.
,
Vahdati
,
M.
,
Carolan
,
D.
, and
Dear
,
J. P.
,
2017
, “
Numerical Investigation on an Array of Helmholtz Resonators for the Reduction of Micro-Pressure Waves in Modern and Future High-Speed Rail Tunnel Systems
,”
J. Sound Vib.
,
400
, pp.
606
625
.
23.
JCGM
,
2008
, Evaluation of Measurement Data—Guide to the Expression of Uncertainty in Measurement, Joint Committee for Guides in Metrology, Paris, Standard No.
JCGM 100:2008
.https://www.bipm.org/utils/common/documents/jcgm/JCGM_100_2008_E.pdf
You do not currently have access to this content.