【摘要】 采用常压铸渗成型工艺制备了一种新型的三维连续网络结构碳化硅/铸铁铸态复合材料,用模态分析法对比测试了复合材料与普通铸铁材料的阻尼特性。结果表明;复合材料的阻尼比比普通铸铁材料有较大幅度提高;在两点刚性支承状态下,复合材料的振幅衰减比灰铸铁试样振幅衰减更迅速,第一阶阻尼比为灰铸铁的2.3倍,频响函数幅值(噪声分贝)比灰铸铁降低3.23dB,减振效果明显。更多还原

【Abstract】 The infiltration casting method is used for the preparation of three-dimensional co-continuous network structure of silicon/cast iron composite material in atmospheric pressure. Using modal analysis method, ordinary cast iron specimen and composite sample are compared about damping factors. The results show that the damping ratio of the composite has a big improved compared with that of cast iron. Amplitude attenuation of the composite material is more quickly than that of ordinary cast iron samples. Supported in two rigid points state, the first step damping ratio of the composite material is 2.3 times of ordinary cast iron. The frequency sound function peak-to-peak value (noise decibel) reduces 3.23dB than ordinary cast iron.更多还原