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A review on aerodynamic load and dynamic behavior of railway noise barriers when high-speed trains pass
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0003-2668-1329
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0003-0089-8140
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0003-3548-6082
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering. Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, National Engineering Research Center for Prestressing Technology, School of Civil Engineering, Southeast University, 211189, Nanjing, PR China.ORCID iD: 0000-0002-8372-1967
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2023 (English)In: Journal of Wind Engineering and Industrial Aerodynamics, ISSN 0167-6105, E-ISSN 1872-8197, Vol. 239, article id 105458Article in journal (Refereed) Published
Abstract [en]

Noise barriers need to be installed along high-speed railway lines to protect nearby inhabitants from the noise pollution caused by the running of high-speed trains (HSTs). The vertical noise barrier is the main structural type. However, when an HST passes through the noise barriers sited along the track, significant and transient aerodynamic pressure will act on the surface of the noise barriers, resulting in strong dynamic responses and even fatigue damage. Therefore, it is important to determine the train-induced aerodynamic load on the barrier surface and analyze the dynamic behaviors of the noise barriers under such a load for its structural design and to guarantee its safety and durability. This paper is a systematic review of the current literature on the aerodynamic load and dynamic behavior of vertical noise barriers; it includes (1) a summary and analysis of characteristics of such aerodynamic pressure and relevant influencing factors, (2) an introduction to measurement methods of aerodynamic load and relevant pressure models on the surface of noise barriers, and (3) a description of the dynamic response and fatigue analysis of noise barriers under such loads. Finally, potential further studies on this topic are discussed, and conclusions are drawn.

Place, publisher, year, edition, pages
Elsevier, 2023. Vol. 239, article id 105458
Keywords [en]
Noise barrier, Railway, High-speed train, Aerodynamic load, Dynamic response, Fatigue
National Category
Vehicle Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-98162DOI: 10.1016/j.jweia.2023.105458ISI: 001015391400001Scopus ID: 2-s2.0-85160798389OAI: oai:DiVA.org:ltu-98162DiVA, id: diva2:1765650
Funder
Swedish Transport Administration, “Excellence Area 4” and FOI-BBT program (grant number BBT-2019-022)
Note

Validerad;2023;Nivå 2;2023-06-12 (joosat);

Licens fulltext: CC BY License

Available from: 2023-06-12 Created: 2023-06-12 Last updated: 2024-03-07Bibliographically approved
In thesis
1. Characterization of train-induced aerodynamic loads on high-speed railway vertical noise barriers
Open this publication in new window or tab >>Characterization of train-induced aerodynamic loads on high-speed railway vertical noise barriers
2023 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

High-Speed Railway (HSR) technology requires the deployment of noise barriers to mitigate noise pollution affecting nearby residents. As train speeds increase, so does the magnitude of aerodynamic effects such as aerodynamic noise and the pressure on these barriers, meaning that these structures require robust sound insulation and structural load-bearing capacities. Train-induced aerodynamic loads must therefore be accounted for in the structural design of HSR noise barriers, and accurate characterization of these loads is vital for ensuring noise barrier performance and safety.

Current European standards primarily evaluate aerodynamic loads on noise barriers based on train speed and the distance to the track centre. However, geometric differences between high-speed trains (HSTs) from different countries and regions necessitate the validation and potential revision of existing load calculation models. This thesis aims to enhance the characterization of train-induced aerodynamic pressure on HSR noise barriers and develop more accurate models for its calculation, focusing on the most common barrier type—vertical noise barriers.

Initially, a thorough literature review was conducted to assimilate current knowledge on this topic and pinpoint existing gaps and challenges. Multiple factors including the geometric properties of trains and the heights of noise barriers were then analysed using computational fluid dynamics (CFD) simulations to evaluate their impact on the train-induced aerodynamic pressure on vertical noise barriers. Finally, the suitability of existing pressure calculation models was evaluated using literature data and a modified calculation model building on the EN 14067-4 model was developed. 

A key finding is that the general applicability of existing pressure calculation models is limited because of the wide variation in HST geometries and noise barrier heights. The amplitude of train-induced aerodynamic pressure on vertical noise barriers increases with train height and width but decreases as nose length increases. While taller noise barriers experience greater aerodynamic pressures, the in-crease in pressure with barrier height is not significant. The proposed modified pressure calculation model that accounts for train geometry and the height distribution coefficient predicts the train-induced aerodynamic pressure on vertical noise barriers more accurately than existing models and could thus improve the structural design and safety of HSR noise barriers across a wide range of conditions.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2023
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
Keywords
Aerodynamic pressure, Computational fluid dynamics, Train geometry, High-speed railway, High-speed train, Load calculation model, Vertical noise barrier
National Category
Fluid Mechanics and Acoustics
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-101574 (URN)978-91-8048-399-5 (ISBN)978-91-8048-400-8 (ISBN)
Presentation
2023-12-08, F1031, Luleå university of technology, Luleå, 13:30 (English)
Opponent
Supervisors
Funder
Swedish Transport Administration, BBT-2019-022Swedish Transport Administration, Excellence Area 4
Available from: 2023-10-12 Created: 2023-10-12 Last updated: 2023-11-17Bibliographically approved

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Liu, DongyunWang, ChaoGonzalez-Libreros, JaimeTu, YongmingElfgren, LennartSas, Gabriel

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