Topology optimization of an acoustic metamaterial with negative bulk modulus using local resonance
We propose a level set-based topology optimization to design acoustic metamaterials using the Finite Element Method. We formulate the optimization problem using effective material properties. A two-step optimization process enabled to handle the design of effective bulk modulus. In all examples we successfully obtain optimized shapes with negative bulk modulus.
topology optimization acoustic metamaterials negative bulk modulus local resonator level set method adjoint variable method