ABSTRACT

This study established a 3D seismic analysis model for the reef-seawater system, in which the fluid-solid interaction algorithm, the fluid and solid artificial boundaries are adopted for numerical modelling, and the boundary substructure method is used for seismic wave input. On that basis, we conduct a comparative seismic analysis between 2D and 3D models. The results show that the ground motion distributions in the middle reef regions calculated by 2D and 3D models are generally consistent with each other. However, in the areas where the topography changes drastically, the 3D terrain shows an important influence on the local seismic response.

中文翻译：

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珊瑚礁-海水系统的地震分析：3D 和 2D 模型的比较

摘要

本研究建立了礁-海水系统的3D地震分析模型，该模型采用流固耦合算法，采用流固人工边界进行数值建模，地震波输入采用边界子结构方法。在此基础上，我们对 2D 和 3D 模型进行了比较地震分析。结果表明，2D和3D模型计算的礁中区地震动分布基本一致。然而，在地形剧烈变化的地区，3D 地形对局部地震响应具有重要影响。