Mathematical Modeling and Simulation for Origami Tsunami Pod

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  • Modeling and Simulation in Applied Mathematics : Proceedings of Annual Workshop on Modeling and Simulation in Applied Mathematics, December 20, 2015 JOSAI UNIVERSITY

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Tsunami is caused by a large coastal earthquake. Spherical tsunami shelters were developed in order to avoid serious damages by tsunami. In this paper, we develop the three dimensional model named tsunami pod as a triangulated ellipsoid which can be folded fatly, conduct the numerical simulation by FEM software, and confirm the safety by the von Mises Equivalent value and Head Injury Criterion (HIC). As the result of the first simulation, it is proven that the initial model is weak to the impact force from rigid wall and obstacles and can be strained in the central part. On the other hand, an occupant hits against the internal wall and can be injured. So, the seat and upper and lower bars are added to the initial model. The von Mises equivalent value for the modified model is decreased, however is still over the one of the first simulation. While, HIC value is decreased largely which is much less than the HIC safety level. This is because an occupant does not hit on the internal wall for the occupant restraint system. Moreover, we optimize the form and property for the tsunami pod by minimizing its weight. Finally, we confirm the validity of the optimal model in the original condition of fluid-structure coupling analysis.

Modeling and Simulation in Applied Mathematics : Proceedings of Annual Workshop on Modeling and Simulation in Applied Mathematics, held at Josai Unversity on December 20 in 2015 / edited by Masahiro FUJITA, Manabu INUMA, Takahiro TSUCHIYA, Hidenori YASUDA

identifier:JOS-13447777-0903

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