期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 499, 期 -, 页码 283-288出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2018.07.021
关键词
Aerogel; Acoustics; Mechanical characterization; Genetic algorithm
资金
- COST (European Cooperation in Science and Technology) [DENORMS CA15125]
- French ANR [ANR-13-BS09-0003]
- Ministerio de Economia y Competitividad of the Spanish Goverment
- European Union Fondo Europeo de Desarrollo Regional (FEDER) [TEC2014-53088-C3-1-R]
A multiobjective optimization procedure is employed to retrieve the viscoelatic parameters of silica aerogel clamped plates. This retrieval method preserves the aerogel sample integrity and, in contrast to the existing ones, relies on the minimization of two different cost functions. The first one, namely J(1), is related to the reflective properties of clamped plates backed by a rigid cavity, while the second one, namely J(2), concerns both the reflectance and transmittance spectra measured in transmission configuration. The recovered parameters are in agreement with previously reported values in the literature. In addition, they are also supported by designing structures for perfect absorption (100% of absorption), which has been validated experimentally. Aerogel plates can be therefore used as innovative building units of artificial structures for the broadband absorption of sound.
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