DEVELOPMENT OF A MATRIX ARRAY SHAPED VIRTUAL WAVE-MAKING PLATE FOR MULTI-ZOOMING TSUNAMI SIMULATION BASED ON THE PARTICLE METHOD

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  • 粒子法による多段階ズーミング津波解析に向けたマトリックスアレイ状の仮想造波板

Abstract

A simulation tool which can predict possible damages to the structures in coastal area plays decisive roles to mitigate and prevent next huge tsunami. According to the previous researches on the analysis of tsunami, two-dimensional shallow water simulation have been developed to project tsunami height and tsunami arrival times, as well as three-dimensional analysis have been utilized to evaluate tsunami fluid force in local scale. The authors have developed multi-zooming tsunami simulation having both advantages of two-dimensional tsunami analysis (finite difference method) and three-dimensional tsunami analysis (particle method). However there are no boundary treatments which can manipulate measured values in each analysis with high accuracy. In this study, matrix array shaped virtual wave-making plate was suggested as a boundary treatment method for multi-zooming tsunami simulation by using particle method. Limitation of application of previous scheme was described based on two validation problems. Besides we confirmed that complicated velocity distribution can be replicated correctly using suggested method.

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