编织结构复合材料动态特性的实验模态分析  

EXPERIMENTAL MODAL ANALYSIS ON DYNAMIC CHARACTERISTICS OF BRAIDED STRUCTURAL COMPOSITES

作　　者：姚学锋[1,2,3] 姚振汉[1,2,3] 戴福隆 杨桂[1,2,3] 杜慧英 

机构地区：[1]清华大学工程力学系 [2]中华复合材料制品有限公司 [3]北京大学力学系

出　　处：《复合材料学报》1998年第4期107-112,共6页Acta Materiae Compositae Sinica

摘　　要：利用实验模态分析方法对碳纤维／环氧树脂编织结构增强复合材料的动态力学特性进行了实验研究，确定了编织复合材料梁、管的振动模态参数与传递函数，并与钢质梁、管的动态性能相比较。结果表明：在冲击脉冲载荷作用下，先进编织结构复合材料与传统金属材料相比具有较高的固有频率、阻尼比，以及比刚度大、稳定性好、对冲击脉冲载荷作用的减震效果等良好的综合动力学特性。Dynamic mechanical characteristics of carbon fiber/epoxy braided structural reinforced composites are studied by means of the experimental modal analysis technique and the vibration modal parameters and the frequency response functions of braided composites beam and tube are analyzed. By comparison with dynamic properties of steel beam and tube, the results reveal that advanced braided structure composite has good dynamic mechanics behavior such as relatively high natural frequencies, damping ratios and the ratio of stiffness to weight as well as fairly good stabilization and the obvious effect of shock absorption on the impulsive pulse.

关 键 词：实验模态分析 编织结构 复合材料 动力学特性 

分 类 号：TB330.2[一般工业技术—材料科学与工程]