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- Title
Topology optimization with a parametric level set method for double porosity poroelastic sound-absorbing structures.
- Authors
Li, Zhuang; Wang, Jiaxuan; Zhang, Zhifu; Huang, Qibai
- Abstract
The mesoscopic pores of double-porosity media are usually designed to enhance the pressure diffusion effect to improve sound absorption. In this paper, a topology optimization model with a parametric level set method for double-porosity structures is developed to design the distribution of mesoscopic pores for maximizing sound absorption. The sound propagation in poroelastic media is described by the Biot-Allard theory, and the sound absorption is obtained by the power balance approach. Structure boundaries during optimization are traced by a parametric level set method. A distance regularization term is added to the objective function to ensure the numerical stability. Numerical examples in 2D waveguides are given to verify the model, and the effects of initial designs and distance regularization on the optimized configuration are discussed. We find that with the target over a wide frequency range, the strengthening of frame elastic effect during the optimization process is accurately described by the power balance approach and demonstrates the advantage of the poroelastic model for topology optimization over the equivalent fluid model.
- Subjects
LEVEL set methods; POROELASTICITY; TOPOLOGY; ABSORPTION of sound; NUMERICAL functions; POROSITY
- Publication
Structural & Multidisciplinary Optimization, 2024, Vol 67, Issue 6, p1
- ISSN
1615-147X
- Publication type
Article
- DOI
10.1007/s00158-024-03798-8