تقرير
An explicit granular-mechanics approach to marine sediment acoustics
العنوان: | An explicit granular-mechanics approach to marine sediment acoustics |
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المؤلفون: | Clark, Abram H., Olson, Derek R., Swartz, Andrew J., Starnes, W. Mason |
سنة النشر: | 2024 |
المجموعة: | Condensed Matter Physics (Other) |
مصطلحات موضوعية: | Condensed Matter - Soft Condensed Matter, Physics - Geophysics |
الوصف: | Here we theoretically and computationally study the frequency dependence of phase speed and attenuation for marine sediments from the perspective of granular mechanics. We leverage recent theoretical insights from the granular physics community as well as discrete-element method simulations, where the granular material is treated as a packing of discrete objects that interact via pairwise forces. These pairwise forces include both repulsive contact forces as well as dissipative terms which may include losses from the fluid as well as losses from inelasticity at grain-grain contacts. We show that the structure of disordered granular packings leads to anomalous scaling laws for frequency-dependent phase speed and attenuation that do not follow from a continuum treatment. Our results demonstrate that granular packing structure, which is not explicitly considered in existing models, may play a crucial role in a complete theory of sediment acoustics. While this simple approach does not explicitly treat sound propagation or inertial effects in the interstitial fluid, it provides a starting point for future models that include these and other more complex features. Comment: Accepted for publication in the Journal of the Acoustical Society of America |
نوع الوثيقة: | Working Paper |
الوصول الحر: | http://arxiv.org/abs/2405.06614Test |
رقم الانضمام: | edsarx.2405.06614 |
قاعدة البيانات: | arXiv |
الوصف غير متاح. |