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A platform for research: civil engineering, architecture and urbanism
Computation Model for Structure-Borne Noise from Railway Bridge with CLD
Abstract With the increase of running speed and axel load of trains, the structure-borne noise emanating from the railway bridges is more and more serious. The constrained layer damping can achieve an obvious reduction of vibration and noise of the treated structure in a wide frequency range by means of dissipating the vibration energy owing to damping layer’s shear deformation. Based on the train-track-bridge coupled vibration, modal strain energy method and statistical energy analysis, a theoretical model for calculating the vehicle-induced vibration and noise of the railway bridge with constrained layer damping is presented. The vibration and noise of the (32 + 40 + 32) m steel-concrete composite bridge before and after constrained layer damping installation is simulated. The structure-borne noise radiated by the bridge in the whole analysis frequency range is reduced significantly. The sound pressure level at the field point which is 30 m to the track centerline in horizontal direction and 1.5 m to the ground in vertical direction is reduced by 4.3 dB(A).
Computation Model for Structure-Borne Noise from Railway Bridge with CLD
Abstract With the increase of running speed and axel load of trains, the structure-borne noise emanating from the railway bridges is more and more serious. The constrained layer damping can achieve an obvious reduction of vibration and noise of the treated structure in a wide frequency range by means of dissipating the vibration energy owing to damping layer’s shear deformation. Based on the train-track-bridge coupled vibration, modal strain energy method and statistical energy analysis, a theoretical model for calculating the vehicle-induced vibration and noise of the railway bridge with constrained layer damping is presented. The vibration and noise of the (32 + 40 + 32) m steel-concrete composite bridge before and after constrained layer damping installation is simulated. The structure-borne noise radiated by the bridge in the whole analysis frequency range is reduced significantly. The sound pressure level at the field point which is 30 m to the track centerline in horizontal direction and 1.5 m to the ground in vertical direction is reduced by 4.3 dB(A).
Computation Model for Structure-Borne Noise from Railway Bridge with CLD
Liu, Quanmin (author) / Li, Xiaozhen (author) / Zhang, Xun (author)
2017-06-28
8 pages
Article/Chapter (Book)
Electronic Resource
English
Railway composite bridge , Constrained layer damping , Structure-borne noise , Simulation , Modal strain energy Engineering , Geoengineering, Foundations, Hydraulics , Geotechnical Engineering & Applied Earth Sciences , Vibration, Dynamical Systems, Control , Monitoring/Environmental Analysis , Building Repair and Maintenance , Transportation Technology and Traffic Engineering
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