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THE NUMERICAL PREDICTION OF RAILWAY INDUCED VIBRATIONS IN AN URBAN ENVIRONMENT

Coulier, P.; Francois, S.; Lombaert, G.; Degrande, G.;

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Boundary element methods are often employed in the numerical prediction of railway induced vibrations. The evaluation of large models is limited, however, due to the computational requirements in terms of memory storage and computation time, which impedes to rigorously account for the presence of multiple buildings in an urban area. This paper presents a novel hierarchical boundary element method for elastodynamics based on halfspaceGreen’s functions; meshing of the free surface and the layer interfaces is hence avoided. Numerical examples are discussed to demonstrate the effectiveness of the methodology, indicating that the model size can be increased with an order of magnitude, which allows to perform large scale boundary element computations. A synthetic case study of an urban environment is finally introduced to investigate the influence of the trough–soil coupling of closely spaced buildings on the wavefield in the soil and the structural response.

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Palavras-chave: Boundary element method,H –matrices, elastodynamics, halfspaceGreen’s functions, railway induced vibrations,

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DOI: 10.5151/meceng-wccm2012-19476

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Como citar:

Coulier, P.; Francois, S.; Lombaert, G.; Degrande, G.; "THE NUMERICAL PREDICTION OF RAILWAY INDUCED VIBRATIONS IN AN URBAN ENVIRONMENT", p. 3581-3596 . In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1]. São Paulo: Blucher, 2014.
ISSN 2358-0828, DOI 10.5151/meceng-wccm2012-19476

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