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本文应用投影云纹法研究受压加劲板的大挠度非线性问题。用投影云纹法测量加劲板后屈曲平衡路径,记录了随着载荷的增加,加劲板后屈曲模态变化的全过程。将云纹图输入微型计算机处理,获得了加劲板的全场位移和全场应力的分布情况。用投影云纹法所测得的结果同理论计算值基本吻合。
In this paper, the large-deflection nonlinearity problem of the stressed stiffener is studied by using the projection moiré method. The projection buckling method was used to measure the post-buckling equilibrium path of the stiffened plate. The whole process of the post-buckling mode change of the stiffened plate was recorded with the increase of the load. The input of the moiré pattern to the microcomputer is processed to obtain the distribution of the full field displacement and the stress of the entire field of the stiffened plate. The results obtained by the projection moiré method are basically consistent with the theoretical calculations.