玻纤针刺毡热塑性复合材料振动特性实验研究  

Experimental Research on Vibration Damping Properties of GMT

作　　者：曹亮[1] 陶庆水 

机构地区：[1]湖南工程学院机械工程学院,湘潭411104 [2]湘潭大学机械工程学院,湘潭411105

出　　处：《湖南工程学院学报（自然科学版）》2015年第4期32-35,共4页Journal of Hunan Institute of Engineering(Natural Science Edition)

基　　金：湖南工程学院研究生科技创新项目(z)

摘　　要：玻璃纤维针刺毡热塑性复合材料(GMT)具有比强度高、减震性能好、可回收且价格低等优点,已经广泛应用于制造汽车零部件以实现汽车的轻量化.采用连续弹性体悬臂梁模态测试方法研究GMT动弹性模量和阻尼特性,分析悬臂梁长及宽度对GMT的动弹性模量和阻尼的影响规律,研究动弹性模量和振动频率的关系.实验结果表明:当悬臂梁的宽度和厚度一定时,悬臂梁越长,各阶频率对应的阻尼值越小,而动弹性模量越大,但均小于静弹性模量.这些研究成果为GMT的工程应用,特别为汽车零部件设计提供可靠了实验数据.Owing to the advantages of high strength/weight, good vibration attenuation effec, retrievability and low price, Glass Mat reinforced Thermoplastics（GMT） have been increasingly used in transportation products for lightweight design. The vibration test of cantilever beam samples is used for measure- ment of dynamic elastic modulus and damp of GMT. Both the influence of the ratio of beam length to beam height on the measured results and the relationship between dynamic elastic modulus and frequency of vibration are investigated. The experimental results show that when the width and thickness of the cantilever beams are certain, the shorter the length of the cantilever beams is, the greater the impact on the measurement of dynamic elastic modulus and damp is. However, the dynamic elastic modulus is less than static elastic modulus. All the experimental results provide the basis for the engineering application, especially for design of automobile procucts.

关 键 词：复合材料 动弹性模量 阻尼 GMT 

分 类 号：U465.6[一般工业技术—材料科学与工程]