Abstract

The shear wave characteristics of shallow seafloor sediment are vital to marine acoustic study and ocean engineering exploration. We analyzed the shear wave speed and the physical properties of the southern Yellow Sea sediment based on the Grain-Shearing (GS) model. The results show that: (1) The shear wave speed of the high-porosity sediment is lower than that of the low-porosity sediment; (2) The shear wave speed of the fine-grained sediment is lower than that of the coarse-grained sediment; (3) The burial depth of the sediment has a significant influence on the shear wave speed of the seafloor sediment. The GS model agrees well with the measurement data from the southern Yellow Sea. However, the quantitative analysis of the impact of input parameters on the GS model requires further research.

摘要

浅海海底沉积物的剪切波特性对海洋声学研究和海洋工程勘探具有重要意义。我们基于晶粒剪切（GS）模型分析了黄海南部沉积物的剪切波速度和物理性质。结果表明：（1）高孔隙度沉积物的剪切波速度低于低孔隙度沉积物；（2）细粒沉积物的剪切波速度低于粗粒沉积物；(3) 沉积物埋藏深度对海底沉积物剪切波速有显着影响。GS 模型与黄海南部的测量数据吻合良好。然而，对输入参数对 GS 模型影响的定量分析需要进一步研究。