### Abstract

Language | English |
---|---|

Pages | 2240-2251 |

Number of pages | 12 |

Journal | Journal of the Acoustical Society of America |

Volume | 127 |

Issue number | 4 |

DOIs | |

State | Published - 2010 |

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*Journal of the Acoustical Society of America*,

*127*(4), 2240-2251. DOI: 10.1121/1.3308473

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*Journal of the Acoustical Society of America*, vol. 127, no. 4, pp. 2240-2251. DOI: 10.1121/1.3308473

**On wavemodes at the interfaxce of a fluid and a fluid-saturated poroelastic solid.** / Dalen, K.N.; Drijkoningen, G.; Smeulders, D.M.J.

Research output: Contribution to journal › Article › Academic › peer-review

TY - JOUR

T1 - On wavemodes at the interfaxce of a fluid and a fluid-saturated poroelastic solid

AU - Dalen,K.N.

AU - Drijkoningen,G.

AU - Smeulders,D.M.J.

PY - 2010

Y1 - 2010

N2 - Pseudo interface waves can exist at the interface of a fluid and a fluid-saturated poroelastic solid. These waves are typically related to the pseudo-Rayleigh pole and the pseudo-Stoneley pole in the complex slowness plane. It is found that each of these two poles can contribute (as a residue) to a full transient wave motion when the corresponding Fourier integral is computed on the principal Riemann sheet. This contradicts the generally accepted explanation that a pseudo interface wave originates from a pole on a nonprincipal Riemann sheet. It is also shown that part of the physical properties of a pseudo interface wave can be captured by loop integrals along the branch cuts in the complex slowness plane. Moreover, it is observed that the pseudo-Stoneley pole is not always present on the principal Riemann sheet depending also on frequency rather than on the contrast in material parameters only. Finally, it is shown that two additional zeroes of the poroelastic Stoneley dispersion equation, which are comparable with the -poles known in nonporous elastic solids, do have physical significance due to their residue contributions to a full point-force response.

AB - Pseudo interface waves can exist at the interface of a fluid and a fluid-saturated poroelastic solid. These waves are typically related to the pseudo-Rayleigh pole and the pseudo-Stoneley pole in the complex slowness plane. It is found that each of these two poles can contribute (as a residue) to a full transient wave motion when the corresponding Fourier integral is computed on the principal Riemann sheet. This contradicts the generally accepted explanation that a pseudo interface wave originates from a pole on a nonprincipal Riemann sheet. It is also shown that part of the physical properties of a pseudo interface wave can be captured by loop integrals along the branch cuts in the complex slowness plane. Moreover, it is observed that the pseudo-Stoneley pole is not always present on the principal Riemann sheet depending also on frequency rather than on the contrast in material parameters only. Finally, it is shown that two additional zeroes of the poroelastic Stoneley dispersion equation, which are comparable with the -poles known in nonporous elastic solids, do have physical significance due to their residue contributions to a full point-force response.

U2 - 10.1121/1.3308473

DO - 10.1121/1.3308473

M3 - Article

VL - 127

SP - 2240

EP - 2251

JO - Journal of the Acoustical Society of America

T2 - Journal of the Acoustical Society of America

JF - Journal of the Acoustical Society of America

SN - 0001-4966

IS - 4

ER -