2019_programme: WAVE PROPAGATION IN SOFT SOLID HALF SPACES AND EVANESCENT PRESSURES IN OVERLYING WATERD

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  • Session: 15. Acoustics of marine renewable energy developments
    Organiser(s): Robinson Stephen, Lepper Paul, Blondel Philippe
  • Lecture: WAVE PROPAGATION IN SOFT SOLID HALF SPACES AND EVANESCENT PRESSURES IN OVERLYING WATERD [invited]
    Paper ID: 852
    Author(s): Hazelwood Dick, Macey Patrick
    Presenter: Hazelwood Dick
    Presentation type: oral
    Abstract: Typical sedimentary seabeds have very slow shear wave speeds which rise with depth. This can be modeled with a linear depth profile of the shear wave speed\nA simpler model has uniform solid material under a fluid half space, both extending to infinity as described by Scholte. Finite element modeling has been used to study both, when the solid is deformed by an impact, simulating piling or dredging actions. \nOff shore piling is used for wind turbine installation, and the consequences to seabed wildlife are associated with the wave energy which is radiated outward.\nIn addition to the ground roll interface waves, as discussed at earlier conferences, we find other wave forms which may also contribute to the vibrations in seabed sediments and the evanescent pressures they create in adjacent water. \nWave propagation in the linear graded solid model can be predicted using circular ray pathways, all of which have their centre at the same height above the seabed. This is controlled by the shear speed profile.
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  • Corresponding author: Dr Hazelwood Richard (Dick)
    Affiliation: R&V Hazelwood Associates LLP
    Country: United Kingdom
    e-mail:

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