李佳珂,张会星,白冰,张建敏

• 1:中国海洋大学
• 2:海底科学与探测技术教育部重点实验室

摘要(Abstract)：

以具有倾斜对称轴的横向各向同性(Titled Transverse Isotropic,TTI)介质中纯准P波二阶方程为基础,通过引入辅助波场实现了方程的降阶,推导出了TTI介质纯准P波一阶压力-速度方程,并利用旋转交错网格高阶有限差分方法对方程进行数值求解,给出了完全匹配层(Perfectly Matched Layers,PML)吸收边界条件在该方程中应用的方法。理论分析及数值模拟结果表明:相对于二阶形式的准P波方程,该TTI介质纯准P波一阶压力-速度方程在计算精度相同的情况下,具有更高的计算效率;同时能更准确地描述对称轴参数变化剧烈的TTI介质中准P波的传播规律。

关键词(KeyWords)： TTI介质;纯准P波;旋转交错网格;PML边界;Wedge模型

Abstract:

Keywords:

基金项目(Foundation): 中央高校基本科研业务费专项(201822011);; 国家自然科学基金(41674118);; 国家科技重大专项(2016ZX05027-002)联合资助

作者(Author): 李佳珂,张会星,白冰,张建敏

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