Automating the analysis of results of a holographic experiment

This article examines an algorithm for the computer analysis of holographic interference fringes of cylindrical shells in a three-hologram, double-exposure experiment conducted to study displacements. The method, based on graphical input of the coordinates of reference points on lines of equal order and approximation of order surfaces on the basis of regression analysis, makes it possible to formalize selection of the type of nonlinear mathematical model and speed up subsequent calculations. The statistical characteristics of the model and the regression process improve with an increase in the number of points. An analysis is made of the accuracy of the analysis of holographic interference fringes by the proposed method using the example of results of tests of a cylindrical shell with a nonplanar end in uniaxial compression. Satisfactory agreement is seen between data obtained by the proposed method and the traditional method.Translated from Problemy Prochnosti, No. 5, pp. 78–85, May, 1994.