复合材料梁的脱层识别  

DELAMINATED INVERSION OF COMPOSITE BEAMS

作　　者：罗松南[1,2] 曹志远[1] 傅衣铭[2] 

机构地区：[1]同济大学工程力学与技术系,固体力学教育部重点实验室,上海200092 [2]湖南大学工程力学系,上海200092

出　　处：《复合材料学报》2002年第5期90-94,共5页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金 (19872 0 2 4)

摘　　要：本文作者研究了具任意脱层复合材料梁的单参数振动反分析。基于弹性理论 ,建立了复合材料脱层梁的基本方程式。对脱层梁进行了分区处理 ,方便地描述了脱层长度、脱层位置。利用边界条件、区间位移连续性条件和弯矩剪力平衡条件建立了反分析的特征方程式。综合考虑系统的一阶固有频率和一阶振型 ,通过反分析特征方程式求出某一待定参数。The delaminated inversion of a composite beam is investigated by the method of model analysis. The basic equations of composite material delaminated beam are built on the basis of elastic theory. The different sizes and positions of delamination are described easily because of the beam being divided into regions. The characteristic equations are established by using the boundary conditions, continuous conditions of the displacements and equilibrium conditions of the shearing force and moment in each region. Considering the first intrinsic frequency and the first vibration shape of the system, one parameter is known by resolving the characteristic equations. Thus, the theoretical basis is provided for non-damage test in engineering.

关 键 词：脱层识别 复合材料梁 模态分析 脱层反演 工程结构 无损检测 单参数振动反分析 

分 类 号：TB12[理学—工程力学] O342[理学—力学]