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808 - Structural and acoustical response in buildings due to surface traffic in the higher frequency range
Fiala P., Degrande G., Granat J., Augusztinovicz F.
Abstract
The paper deals with the problem of dynamic soil-structure interaction in the higher frequency range, with emphasis on the computation of the structural and acoustical response of a building due to an incoming wave field generated by (high-speed) railway traffic at grade. In the recent years a couple of models have been developed that allow for the computation of the incident wave field generated by surface transport, as well as the vibration response in adjacent buildings. These models have been validated in the lower frequecy range, for road and railway traffic. The source model consist of the model of a moving vehicle on a longitudinally invariant domain coupled to a boundary element model of the underlying horizontally layered ground. The receiver model is based on a substructuring formulation and consists of a boundary element model of the soil and a finite element model of the structure. The combined FE-BE model allows to calculate the dynamic loads due to the incoming wave field, and the FE model is used to determine the structural response. The acoustical response of the building's rooms is computed by means of a standard boundary element formulation, or alternatively, a Rayleigh integral based simplified method. The present paper deals with the problems of computations in the higher frequency range, i.e. high density of structural modes and the problem of fictitious eigenfrequencies. It also discusses computational methods that allow to determine the acoustical response in the building's closed rooms, and investigates the structural and acoustical response of a multi-story building supported by different types of foundations.
Citation
Fiala P.; Degrande G.; Granat J.; Augusztinovicz F.: Structural and acoustical response in buildings due to surface traffic in the higher frequency range, CD-ROM Proceedings of the Thirtheenth International Congress on Sound and Vibration (ICSV13), July 2-6, 2006, Vienna, Austria, Eds.: Eberhardsteiner, J.; Mang, H.A.; Waubke, H., Publisher: Vienna University of Technology, Austria, ISBN: 3-9501554-5-7