三维连续网络结构碳化硅铸铁铸态复合材料的减振性能.pdfVIP

学兔兔 2009年第4期 铸 造 设 备 与 工 艺 2009年 8月 FOUNDRY EQUIPMENT AND TECHNOLOGY Aug．2009 No4 · 试验研究· 三维连续网络结构碳化硅 铸铁铸态复合材料的减振性能 冯胜山 ，王泽建 ，刘庆丰 ，许顺红 ，李金山 ，王存贵 (1．湖北工业大学机电研究设计院，湖北武汉 430070；2．江西省萍乡市新安工业有限公司，江西萍乡337000) 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。 关键词：三维网络；碳化硅；铸铁；复合材料；减振 中图分类号：TB33 文献标识码：A 文章编号：1674—6694(2009)04—0007—04 Damping Characteristics of Three-dimensional Co-continuous Network SiC，Cast Iron Composites FENG Sheng-shanI,WANG Ze-jian1,LIU~ng-fe， l，XU Shun-hong~LI Jin-shanz,WANG Cun-guF (1．ResearchDesign Institute ofMechanicalElectronic Engineering，Hubei Univers of Technology， Wuhan Hubei 430070，Chi~；2．Jiangxi Hisina Industrial Co．，Ltd，Pingxiang Jiangxi 337000，China) 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 decibe1)reduces 3．23dB than ordinary cast iron． Key words：three-dimensional network，SiC，cast iron，composite，damping