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磁场对填充磁流变液单元声传输损失的影响

Influence of Magnetic Field on Sound Transmission Loss of the Unit Filled with Magnetorheological Fluid.

作者信息

Xu Xiaomei, Wang Yaqin, Wang Yiwei

机构信息

College of Automobile and Traffic Engineering, Nanjing Forestry University, Nanjing 210037, China.

出版信息

Materials (Basel). 2022 Sep 1;15(17):6032. doi: 10.3390/ma15176032.

DOI:10.3390/ma15176032
PMID:36079413
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9456770/
Abstract

To explore the feasibility of applying magnetorheological fluids (MRFs) in the field of noise control, the influence of the magnetic field intensity and direction on the sound transmission loss (STL) of a unit filled with MRF (MRF unit) were investigated in this study. First, two types of test sample containing the MRF unit were designed and fabricated. The magnetic field applied to the MRF was provided by the permanent magnets used in pairs. The direction of the magnetic field was perpendicular or parallel to the direction of the sound wave propagation. The distribution of the magnetic field intensity of the two types of test samples was simulated using magnetostatic finite element analysis and validated with the magnetic field intensity measured using a Teslameter. For comparison, test samples containing air and water units were also prepared. Then, the STL of the two types of test samples were measured under different magnetic field intensities using the impedance tube method. Finally, the STL curves of the two types of test samples were presented, and the influence of magnetic field intensity and direction on the STL were discussed. The results demonstrate that the magnetic field direction has a significant influence on the STL of the MRF unit. In addition, when the magnetic field direction is parallel to the sound propagation direction, the STL of the test sample containing MRF unit significantly increases with the increase of the magnetic field intensity at low and middle frequencies.

摘要

为了探索磁流变液（MRF）在噪声控制领域应用的可行性，本研究考察了磁场强度和方向对填充MRF的单元（MRF单元）传声损失（STL）的影响。首先，设计并制作了两种包含MRF单元的测试样品。施加于MRF的磁场由成对使用的永磁体提供。磁场方向垂直或平行于声波传播方向。利用静磁有限元分析模拟了两种测试样品的磁场强度分布，并用特斯拉计测量的磁场强度进行了验证。为作比较，还制备了包含空气单元和水单元的测试样品。然后，采用阻抗管法在不同磁场强度下测量了两种测试样品的STL。最后，给出了两种测试样品的STL曲线，并讨论了磁场强度和方向对STL的影响。结果表明，磁场方向对MRF单元的STL有显著影响。此外，当磁场方向平行于声音传播方向时，在低频和中频下，含MRF单元的测试样品的STL随磁场强度的增加而显著增大。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/0a4d52d72112/materials-15-06032-g008a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/1a854f77a258/materials-15-06032-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/213e57e49edb/materials-15-06032-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/07d845de079a/materials-15-06032-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/ec139e9f189e/materials-15-06032-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/b0899d1973f9/materials-15-06032-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/9fbbb1c3702b/materials-15-06032-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/0d8dec72267b/materials-15-06032-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/0a4d52d72112/materials-15-06032-g008a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/1a854f77a258/materials-15-06032-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/213e57e49edb/materials-15-06032-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/07d845de079a/materials-15-06032-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/ec139e9f189e/materials-15-06032-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/b0899d1973f9/materials-15-06032-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/9fbbb1c3702b/materials-15-06032-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/0d8dec72267b/materials-15-06032-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fbf5/9456770/0a4d52d72112/materials-15-06032-g008a.jpg

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