INFLUENCE OF SHAPE AND ABSORBING SURFACE—A NUMERICAL STUDY OF RAILWAY NOISE BARRIERS

1998 ◽  
Vol 217 (3) ◽  
pp. 405-417 ◽  
Author(s):  
P.A. Morgan ◽  
D.C. Hothersall ◽  
S.N. Chandler-Wilde
Keyword(s):  
Numerical Study ◽  
Noise Barriers ◽  
Railway Noise

Characterizing noise barriers: SOPRANOISE half-term progress report

2021 ◽  
Vol 263 (3) ◽  
pp. 3663-3674
Author(s):  
Jean-Pierre Clairbois ◽  
Massimo Garai ◽  
Wolfram Bartolomaeus ◽  
Michael Chudalla ◽  
Fabio Strigari ◽  
...  
Keyword(s):  
Test Methods ◽  
Progress Report ◽  
Physical Significance ◽  
Final Report ◽  
Noise Barriers ◽  
Railway Noise ◽  
Development Phases ◽  
Effective Use

SOPRANOISE targets simplified assessment of the in-situ intrinsic acoustic performances of road / railway noise barriers. This paper presents its half-term progress. The research is divided in 5 Work Packages, the scientific ones being WP2 to WP5.WP2 is about establishing a state of art (SoA) of the intrinsic performances characterization: it is now finished and presented in 2 other papers by Conter and Fuchs. WP3 is about in-situ inspection tools: based on a review / questionnaire, an inspection protocol has been developed allowing simplified assessments mainly based on visual inspections and characterization of possible defects; WP3 is now in its final testing phase. WP4 is about designing a brand new "quick and safe methods" that could take place "in between" the inspection tools and the standardized EN1793-5 and 6; the research and development phases of WP4 are now finished, while its validation along highways is now scheduled. Finally, WP5 is about the use of noise barriers in the European market and the final report: a synthesis on the physical behavior of noise barriers and the physical significance of the test methods has been done, as well a SoA on the effective use of noise barriers; the results will be presented.

Method of recognizing the high-speed railway noise barriers based on the distance image

2016 ◽  
Author(s):  
Le Ma ◽  
Shuangyun Shao ◽  
Qibo Feng ◽  
Bingqian Liu ◽  
Chol Ryong Kim
Keyword(s):  
High Speed ◽  
Noise Barriers ◽  
High Speed Railway ◽  
Railway Noise

scholarly journals Numerical Study of Noise Barriers’ Side Edge Effects on Pollutant Dispersion near Roadside under Various Thermal Stability Conditions

Fluids ◽  
2018 ◽  
Vol 3 (4) ◽  
pp. 105 ◽  
Author(s):  
Liyuan Gong ◽  
Xiuling Wang
Keyword(s):  
Barrier Height ◽  
Edge Effect ◽  
Turbulence Intensity ◽  
Edge Effects ◽  
Numerical Study ◽  
Pollutant Dispersion ◽  
Pollutant Concentration ◽  
Intensity Increase ◽  
Noise Barriers ◽  
Noise Barrier

Roadside noise barrier helps to reduce downwind pollutant concentrations from vehicle emission. This positive characteristic of the construction feature can be explained by its interaction with flow distribution and species dispersion. In this paper, a three-dimensional numerical model has been developed to simulate highway pollutant dispersion—a realizable k-ε model was employed to model turbulent flow, and a non-reaction species dispersion model was applied to simulate species transport. First, numerical models were validated with experimental data, and good agreement was observed. Then, detailed simulations were conducted to study double barriers’ effects on highway pollutant dispersion under different settings: noise barriers with different heights, noise barriers with and without edge effects, and different atmospheric thermal boundary conditions. Results show that: (1) Noise barriers without edge effects cause bigger downwind velocity and turbulence intensity than noise barriers with edge effects. (2) At ground level, lower downwind pollutant concentration and higher pollutant concentration, near upwind barrier and between barriers, are observed for noise barriers without edge effect cases; higher on-road pollutant concentration can be seen near barrier side edges for cases with edge effect. (3) Downwind velocity and turbulence intensity increase as barrier height increases, which causes reduced downwind pollutant concentration. (4) With the same barrier height, under unstable atmospheric boundary condition, the lowest pollutant concentration can be found for both downwind and between barriers. Overall, these findings will provide valuable inputs to noise barrier design, so as to improve roadside neighborhood air quality.

SCALE MODELLING OF RAILWAY NOISE BARRIERS

2000 ◽  
Vol 234 (2) ◽  
pp. 207-223 ◽  
Author(s):  
D.C. HOTHERSALL ◽  
K.V. HOROSHENKOV ◽  
P.A. MORGAN ◽  
M.J. SWIFT
Keyword(s):  
Noise Barriers ◽  
Railway Noise ◽  
Scale Modelling

Scale modeling of railway noise barriers

1998 ◽  
Vol 103 (5) ◽  
pp. 2800-2800 ◽  
Author(s):  
David C. Hothersall ◽  
Kirill V. Horoshenkov ◽  
Philip A. Morgan
Keyword(s):  
Noise Barriers ◽  
Railway Noise ◽  
Scale Modeling
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