Experimental Study of Airborne Noise Reduction of Concrete Channel Girder Bridge Sections Compared With Box Girder for High-Speed Trains
Channel girder is a new type of concrete railway bridge girder section compared with traditional box girder. Channel girder has a U-shaped section with side beams of approximately 2-meter high. In terms of airborne noise, it resembles box girder with sound barriers of the same height, giving it the potential of noise reduction compared with box girder, which may lead to possible cost saving. In this research, the relative noise reduction of channel girder compared with box girder is studied through computer simulation, scale model experiment and full scale model experiment. Additionally, comparisons are made between the relative noise reduction of channel girders with different angles between the deck and side beams, different speed of trains, different train locations, different experimental methods and different receiving points. The results indicate that channel girders can provide effective noise reduction compared with box girder, with a noise level reduction no less than 4 dB at a receiving point of 25 m from the railway midline, 3.5 m above the top of the rail when the side beam angle is 113° and the train is running at 300 km/h on the rail that is closer to the receiver. Increasing the side beam angle is shown to have negative correlation with noise reduction.
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Document Type: Research Article
Publication date: November 1, 2018
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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