【摘要】 本文介绍了激光散斑与有限元数值计算相结合的分析方法。激光散斑测量结构的面内位移具有较高的精度和灵敏度,把所获得的位移数据输入到计算机的有限元程序就可求出应力.这样,可以节省计算机的容量和计算时间,特别是对研究局部感兴趣的区域的应力以及边界条件不甚清楚的问题,更能显示本法的优点。通过一简支梁模型的试验,证明了这种方法是行之有效的。更多还原

【Abstract】 An analysis method combining the laser speckle with the numerical calculation of finite element is described in this paper.The laser speckle method has a satisfactory accuracy and sensitivityfor the measuring of the in-plane displacement of a structure.The displacement obtained in this way is then inputed into acomputer,and use a finite element program to determine thestresses.Since direct numerical differentiation of data is notrequired for strain evaluation,the calculation error may bereduced and the computer time may be saved greatly.This methodhas been verified effective by an experiment in the model testof simply supported beams.更多还原