In this article, the detection of an object buried in marine sediments is investigated. Using the results from a series of experiments realized in a tank filled with water and calibrated glass beads, we evaluate the performances for a wide range of the value of the ratio kd of the grain size to the wavelength (k is the wave number and d is the grain diameter) of three types of prediction tools. The first two prediction tools are based on the definition of an equivalent model. The first tool is based on the well-known Biot–Stoll theory (BM model) while the second tool uses nonperiodic homogenization to define effective velocity and anisotropy maps representing the medium (HM model). The last prediction tool implements a time-domain full-wave numerical method, which takes into account each grain separately (GM model). It is shown that a good agreement between experiments and numerical simulations can be achieved using the BM model for the low kd regime and the HM model for high kd regime.

中文翻译：

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使用有效方法理论和全波数值模拟的水饱和颗粒介质中波传播的数值和实验研究

在本文中，研究了埋藏在海洋沉积物中的物体的检测。使用在装满水和校准玻璃珠的罐中实现的一系列实验的结果，我们评估了晶粒尺寸与波长的比率 kd 值（k 是波数和 d是三种预测工具的粒径）。前两个预测工具基于等效模型的定义。第一个工具基于著名的 Biot-Stoll 理论（BM 模型），而第二个工具使用非周期均质化来定义代表介质的有效速度和各向异性图（HM 模型）。最后一个预测工具实现了时域全波数值方法，它单独考虑了每个晶粒（GM 模型）。