The physics and simulation of wave propagation at the ocean bottom
The physics and simulation of wave propagation at the ocean bottom
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DOI：
10.1190/1.1759469
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发表时间：
2004-05
期刊：
影响因子：
3.3
通讯作者：
J. Carcione;H. B. Helle
中科院分区：
文献类型：
--
作者：
J. Carcione;H. B. Helle
我们调查的一些方面的物理波传播在海底（从软沉积物地壳岩石）。大多数现象与衰减的存在有关。分析需要使用滞弹性应力应变关系和高度精确的建模算法。特别注意模拟海底界面的边界条件和相关的物理现象。为此，我们进一步开发并测试了流体-滞弹性固体界面波传播的伪谱建模算法。该方法基于区域分解技术（一个网格用于流体部分，另一个网格用于固体部分）以及傅立叶和切比雪夫微分算子。我们认为，反射，传输和传播的地震波在海底，模拟为一个平面边界分离的声学介质（海洋）和粘弹性固体（沉积物）。与这个界面相关的主要物理现象是...
We investigate some aspects of the physics of wave propagation at the ocean bottom (ranging from soft sediments to crustal rocks). Most of the phenomena are associated to the presence of attenuation. The analysis requires the use of an anelastic stress‐strain relation and a highly accurate modeling algorithm. Special attention is given to modeling the boundary conditions at the ocean‐bottom interface and the related physical phenomena. For this purpose, we further develop and test the pseudospectral modeling algorithm for wave propagation at fluid‐anelastic solid interfaces. The method is based on a domain‐decomposition technique (one grid for the fluid part and another grid for the solid part) and the Fourier and Chebyshev differential operators. We consider the reflection, transmission, and propagation of seismic waves at the ocean bottom, modeled as a plane boundary separating an acoustic medium (ocean) and a viscoelastic solid (sediment). The main physical phenomena associated with this interface are ...