海啸波与环形岛礁相互作用及致灾机理研究

Research on the Mechanism of Disaster and the Interaction between Tsunami Waves and Atolls

为研究海啸波与环形岛礁相互作用及致灾机理,基于开源程序Dual SPhysics建立了数值波浪水槽,探究了不同地形下海啸波的传播与演化过程,及其对环礁上的建筑物与潟湖内浮体的作用。结果表明,海啸在礁坪上形成的水流对建筑物底部的瞬时冲击力有较强的破坏性,需要提高建筑物底层的设计参数或在其前沿设置防护措施,对在潟湖内停泊船只,应尽量向海啸波来波方向对岸停泊。

In order to analyze the interaction between tsunami waves and atolls its disaster mechanism,we established a numerical wave flume based on the open source program of DualSPhysics and investigated the propagation and evolution process of solitary waves under different topography and their effects of wave propagation on buildings on the atolls and floating bodies in the lagoon.It is found that the current formed by the tsunami on the reef flat has a destructive effect on the instantaneous impact force at the bottom of the building,and consequently it is necessary to improve the design parameters of the bottom of the building or to take protective measures at the front of the building.As for the vessels mooring in the lagoon,they should try to anchor to the opposite side of the incoming tsunami wave。