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为深入研究金属橡胶材料吸声降噪性能,并为该材料吸声结构设计提供依据,实验研究了金属橡胶材料的吸声特性。分析了金属橡胶材料厚度、孔隙率、金属丝直径和平均孔隙直径等特征参数对吸声性能的影响;推导并验证了金属橡胶材料吸声系数第一共振频率的理论计算公式;研究了具有相同平均孔隙直径金属橡胶材料的吸声特性。结果表明:金属橡胶材料可作为均匀、各向同性的多孔吸声材料进行研究,其吸声性能具有可设计性,并且相同平均孔隙直径的金属橡胶材料具有相同的吸声特性。
In order to further study the sound absorption and noise reduction performance of metal rubber materials, and to provide a basis for the design of the sound absorption structure of the material, the sound absorption properties of the metal rubber materials were experimentally studied. The effects of the characteristic parameters such as thickness, porosity, wire diameter and average pore diameter on the sound absorption performance were analyzed. The theoretical formula of the first resonance frequency of the sound absorption coefficient of metal rubber was deduced and validated. Average pore diameter Sound absorption properties of metallic rubber materials. The results show that the metallic rubber material can be used as a uniform and isotropic porous sound-absorbing material, and its sound-absorbing properties are of designability. The same rubber material with the same average pore diameter has the same sound-absorbing properties.