Wang Enshuai, Yang Fei, Shen Xinmin, Duan Haiqin, Zhang Xiaonan, Yin Qin, Peng Wenqiang, Yang Xiaocui, Yang Liu
College of Field Engineering, Army Engineering University of PLA, Nanjing 210007, China.
College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China.
Materials (Basel). 2022 May 10;15(10):3417. doi: 10.3390/ma15103417.
An acoustic metamaterial absorber of parallel-connection square Helmholtz resonators is proposed in this study, and its sound absorption coefficients are optimized to reduce the noise for the given conditions in the factory. A two-dimensional equivalent simulation model is built to obtain the initial value of parameters and a three-dimensional finite element model is constructed to simulate the sound absorption performance of the metamaterial cell, which aims to improve the research efficiency. The optimal parameters of metamaterial cells are obtained through the particle swarm optimization algorithm, and its effectiveness and accuracy are validated through preparing the experimental sample using 3D printing and measuring the sound absorption coefficient by the standing wave tube detection. The consistency between the experimental data and simulation data verifies feasibility of the proposed optimization method and usefulness of the developed acoustic metamaterial absorber, and the desired sound absorption performances for given conditions are achieved. The experimental results prove that parallel-connection square Helmholtz resonators can achieve an adjustable frequency spectrum for the low frequency noise control by parameter optimization, which is propitious to promote its application in reducing the noise in the factory.
本研究提出了一种并联方形亥姆霍兹谐振器的声学超材料吸声器，并对其吸声系数进行了优化，以降低工厂给定条件下的噪声。建立了二维等效仿真模型以获得参数的初始值，并构建了三维有限元模型来模拟超材料单元的吸声性能，旨在提高研究效率。通过粒子群优化算法获得了超材料单元的最优参数，并通过3D打印制备实验样品和采用驻波管检测测量吸声系数，验证了其有效性和准确性。实验数据与仿真数据之间的一致性验证了所提出优化方法的可行性以及所开发声学超材料吸声器的实用性，并实现了给定条件下所需的吸声性能。实验结果证明，并联方形亥姆霍兹谐振器通过参数优化可实现低频噪声控制的可调频谱，有利于推动其在工厂降噪中的应用。
