The giant tsunami in the Indian Ocean (2004) gave a devastating blow by the tsunami run-up to many public facilities and constructions on beaches. In the near future, we are apprehensive that a huge storm surge and a tsunami earthquake which cause destruction of objects such as coastal structures, control forests, houses and oil-storage tanks might occur. Since a part of the broken objects is drifted, secondary damage will occur in inlands. Such phenomenon results in deformations or destructions caused by forces of fluid acting to solids. Therefore, it is necessary for us to understand fluids-structures interaction problems.
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