Evaluation of horizontal homogeneity of geomaterials with the distance analysis of surface waves
Evaluation of horizontal homogeneity of geomaterials with the distance analysis of surface waves
复制标题
利用面波距离分析评价岩土材料的水平均匀性
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
D. Hutchinson
中科院分区：
文献类型：
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作者：
C. Phillips;G. Cascante;D. Hutchinson
本文提出了一种新的面波分析方法--面波距离分析法（DASW）。该方法检查相对于距离的表面波的相位，以确定介质的水平均匀性。理论和数值模拟的有限差分模拟的方法进行了验证。几种情况下进行检查，包括半空间，半空间由两种不同的介质，一个介质的弹性性能的线性变化，和一个半空间包含一个矩形空隙。在时域，频域和frequencywavenumber域的互补信息的使用是一个有用的技术，在复杂的地质环境中的波传播的理解。DASW方法准确地识别介质属性的水平变化。因此，该方法评价了水平均匀性的条件，这是使用面波谱分析（SASW）方法所必需的，并补充了信息的一致性。
A new approach to surface wave analysis, termed the distance analysis of surface waves (DASW) method, is presented. The method examines the phase of surface waves with respect to distance to determine horizontal homogeneity of a medium. The method is verified theoretically and numerically with finite-difference simulations. Several cases are examined, including a half-space, a half-space comprised of two distinct mediums, a medium with a linear variation of elastic properties, and a half-space containing a rectangular void. The use of complementary information in the time domain, frequency domain, and frequencywavenumber domain is presented as a useful technique for the understanding of wave propagation in complex geological settings. The DASW method accurately identifies horizontal changes in medium properties. Therefore, the method evaluates the condition of horizontal homogeneity, which is necessary for the use of the spectral analysis of surface waves (SASW) method, and complements the information co...