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。 This paper introduces the analysis method of combining laser speckle with finite element numerical calculation. Laser speckle measurement structure of the in-plane displacement with high accuracy and sensitivity, the displacement data obtained by the computer’s finite element program can be calculated stress, so that you can save the computer’s capacity and calculation time, especially for Studying the stress of the area of ​​partial interest and the lack of clear boundary conditions can better demonstrate the advantages of this law. The test of a simple supported beam model proves that this method is effective.