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- W2745943158 abstract "Several acoustic models, such as the poro-elastic model, visco-elastic model, and multiple scattering model, have been used for describing the dispersion relation in a porous granular medium. However, these models are based on continuum or scattering theory, and therefore cannot explain the broadband measurements in cases where scattering and non-scattering losses co-exist. Additionally, since the models assume that the porous granular medium consists of grains of identical size (unimodal size distribution), the models does not account for the behavior of wave dispersion in a medium that has a distribution of differing grain sizes. As an alternative approach, this study proposes a new broadband attenuation model that describes the high frequency dispersion relation for the p-wave in the case of elastic grain scatterers existing in the background fluid medium. The broadband model combines the Biot-Stoll plus grain contact squirt and shear flow (BICSQS) model and the quasicrystalline approximation (QCA) multiple scattering model. Additionally, distribution of grain size effect is examined rudimentarily through consideration of bimodal grain size distribution. Through the quantitative analysis of the broadband model and measured data, it is shown that the model can explain the attenuation dependencies of frequency and grain size distribution for a water-saturated granular medium in the frequency range from 350 kHz to 1.1 MHz. This study can be applied to the high frequency acoustic SONAR modeling and design in the water-saturated environment." @default.
- W2745943158 created "2017-08-31" @default.
- W2745943158 creator A5033281833 @default.
- W2745943158 creator A5044038179 @default.
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- W2745943158 date "2018-01-01" @default.
- W2745943158 modified "2023-09-27" @default.
- W2745943158 title "Model-data comparison of high frequency compressional wave attenuation in water-saturated granular medium with bimodal grain size distribution" @default.
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- W2745943158 doi "https://doi.org/10.1016/j.ultras.2017.08.007" @default.
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