  In this paper, we propose a level set-based shape optimization method for
acoustic wave propagation problems with a deformable structure. First, we
propose a mathematical model for acoustic wave propagation with a deformed
structure based on coordinate transformation and the Eulerian approach. Next,
we formulate the shape optimization problem and perform sensitivity analysis
based on the shape derivative concept. We then construct an optimization
algorithm based on the framework of a level set-based shape and topology
optimization method. Finally, we provide two-dimensional optimization examples
that demonstrate the effectiveness of our proposed method in providing
optimized designs with desired functionality, while considering the structural
deformation.
