Determination of the near field distance for point and line sources acting on the surface of an homogeneous and viscoelastic half-space |
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| Authors: | Robert Arcos Jordi RomeuAndreu Balastegui Teresa Pàmies |
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| Institution: | Acoustical and Mechanical Engineering Laboratory (LEAM), Technical University of Catalonia, Spain |
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| Abstract: | A methodology to determine the near field region, defined as the region where volumetric waves significantly influence the surface vibration levels, is presented. This interference region between Rayleigh and volumetric waves is calculated for the case of an homogeneous and viscoelastic half-space excited by a surface point source and a surface infinite line source. This calculation is performed following an analytical approach. The effects of the mechanical properties of the ground on the dimensions of this interference region, characterized here by the near field distance, are also investigated. The results show near field distances for both infinite line and point sources and for five different real grounds, typical of the Barcelona (Spain) metropolitan area. |
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