Numerical Studies on the Generation and Propagation of Tsunami Waves Based on the High-Order Spectral Method  

作　　者：HAO Jian LI Jin-xuan LIU Shu-xue WANG Lei 

机构地区：[1]State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China

出　　处：《China Ocean Engineering》2022年第2期268-278,共11页中国海洋工程（英文版）

基　　金：This study was financially supported by the National Natural Science Foundation of China(Grant Nos.51739010 and 51879037).

摘　　要：An effective numerical model for wave propagation over three-dimensional(3D)bathymetry was developed based on the High-Order Spectral(HOS)method and combined with a moving bottom boundary.Based on this model,tsunami waves caused by various mechanisms were simulated and analyzed.Two-dimensional bed upthrust and the effect of the uplift velocity of the bathymetry on the wave profiles of tsunami waves were studied.Next,tsunami waves caused by 3D submarine slides were generated and the effects of the slide velocity,slide dimension and water depth on the tsunami waves were analyzed.Based on wavelet analysis,the properties of the tsunami wave propagation were investigated.The results show that the bottom movement can significantly affect the generation and propagation of tsunami waves and the studies could help understand the mechanisms of tsunamis caused by a moving bottom boundary.

关 键 词：tsunami waves High-Order Spectral(HOS)method moving bottom boundary wavelet analysis 

分 类 号：P731.25[天文地球—海洋科学]