複数の環境下で機能する音響クロークのトポロジー最適化

抄録

Acoustic cloaks that can cloak an object from both air- and water-borne sounds are designed by a topology optimization based on covariance matrix adaptation evolution strategy (CMA-ES). Two objective functions for cancelling the scattering of both air- and water-borne sounds are minimized and the optimum sets of level set functions which express the structures of acoustic cloaks are explored for the scattering cancellations. Acoustic-elastic coupled problems are solved by finite element method for evaluating the performance of acoustic cloaks.