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以金属纤维多孔材料为研究对象(厚度≤3 mm),以在狭小空间内用于吸声减振为背景,针对材料的制备工艺、结构参数等因素对其进行结构优化。结果表明,烧结温度较低、无烧结结点形成的结构,其吸声性能较好;而且在不同频率范围内,平均孔径和丝径可以通过最优搭配得到性能较好的吸声材料。通过结构优化设计,在烧结温度为850℃,当频率范围为50~6400 Hz时,丝径为Φ12μm,平均孔径分别为10、30、40μm的样品吸声性能较好。
Taking the porous metal fiber as the research object (thickness≤3 mm), taking the sound absorption and vibration reduction as the background in the narrow space, the structure optimization of the material is made according to the preparation process and structural parameters of the material. The results show that the sound absorption performance of the structure with low sintering temperature and no sintered junction is good, and the average pore diameter and the diameter of the wire can be matched optimally to obtain the sound-absorbing material with better performance in different frequency ranges. Through the structural optimization design, the samples with the diameter of Φ12μm and the average pore diameters of 10, 30, 40μm are better at the sintering temperature of 850 ℃ and the frequency range of 50 ~ 6400 Hz.