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Modeling and optimization of sound absorption coefficient of microperforated compressed porous metal panel absorber

机译：微孔压缩多孔金属面板吸收器吸声系数的建模与优化

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The microperforated compressed porous metal panel (MCPMP) absorber was proposed to develop novel sound absorber with excellent sound absorption performance, fewer utilized materials, and more lightweight. Through treating the compressed porous metal with high compression ratio as microperforated panel, theoretical sound absorption model of the MCPMP absorber was constructed through equivalent circuit approach. Structural parameters of the MCPMP absorber were optimized by cuckoo search algorithm for different target frequency range. The obtained optimal MCPMP absorbers were verified by finite element simulation and validated through standing wave tube measurement. Consistencies among the theoretical data, simulation data, and experimental data proved feasibility and accuracy of theoretical sound absorption model, cuckoo search optimization algorithm, and finite element simulation method. Actual average sound absorption coefficients of the optimal MCPMP absorbers with limited total thickness of 20 mm were 0.4679, 0.7069, and 0.7299 when the target frequency ranges were 100-2000 Hz, 100-4000 Hz, and 100-6000 Hz respectively. By comparison with sound absorption performance of the original porous metal and those of the 10-layer gradient compressed porous metal, effectiveness and practicality of the optimal MCPMP absorber was proved. The developed MCPMP absorber was favorable to enrich the sound absorption theory and promote its practical application. (C) 2020 Elsevier Ltd. All rights reserved.
机译：提出了微孔压缩的压缩多孔金属板（MCPMP）吸收器，用于开发具有优异吸收性能，更少利用材料的新型吸声器，更轻质。通过用高压缩比处理压缩的多孔金属作为微孔面板，通过等效电路方法构建MCPMP吸收器的理论声音吸收模型。 MCPMP吸收器的结构参数由Cuckoo搜索算法针对不同目标频率范围进行了优化。通过有限元模拟验证所获得的最佳MCPMP吸收器，并通过驻波管测量验证。经济学数据，仿真数据和实验数据中的一致性证明了理论吸音模型，杜鹃搜索优化算法和有限元仿真方法的可行性和准确性。当目标频率范围为100-2000Hz，100-4000Hz和100-6000Hz时，最佳MCPMP吸收器的最佳MCPMP吸收器的实际平均声音吸收系数为0.4679,0.7069和0.7299。通过比较原始多孔金属的吸声性能和10层梯度压缩的多孔金属，证明了最佳MCPMP吸收器的有效性和实用性。开发的MCPMP吸收器有利于丰富吸音理论并促进其实际应用。 （c）2020 elestvier有限公司保留所有权利。

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