#5638. Topological design of sandwich structures filling with poroelastic materials for sound insulation

August 2026publication date
Proposal available till 22-05-2025
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Journal’s subject area:
Analysis;
Applied Mathematics;
Engineering (all);
Computer Graphics and Computer-Aided Design;
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Abstract:
The poroelastic material is often used as a sandwich core due to its lightweight and excellent sound insulation and absorption, and the research revealed that poroelastic materials with macro- or meso-holes could further improve its sound insulation performance. This study proposes a topology optimization approach to design poroelastic cores of sandwich structures for sound insulation. The mixed displacement/pressure (u/p) formulation based on Biots theory and the ersatz material model are used to overcome the potential difficulties in topology optimization. The floating projection topology optimization method (FPTO) for maximizing sound transmission loss (TL) of sandwich structures filling with poroelastic materials is established based on the floating projection constraint, which simulates 0/1 constraints of the design variables. Some 2D and 3D numerical examples are given to demonstrate the capability and effectiveness of the proposed topology optimization algorithm.
Keywords:
Acoustic-poroelastic interaction; Ersatz material model; Periodic structures; Sound transmission loss; Topology optimization

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