用数字散斑干涉法测量动态面内位移场

In-plane Displacement Field Measuring Using Dynamic DSPI

利用数字散斑干涉法，研究了半无限平面模型在受冲击载荷下的面内位移场的测试技术。采用瞬态图像采集系统，将模型受冲击前后的电子散班图像直接存储在图像采集系统中，通过数字处理实现数字散斑干涉，测得了模型的面内位移。数值计算结果与实验两者能很好地吻合。

In this paper ,the method of measuring the in-plane displacement field under an impact loading is proposed and is named dynamic digital speckle pattern interferometry. By means of transient digital image capturing system,the undedeformed and deformed images are both stored directly in frame memory to achieve digital interfering. In the end of the paper,the in-plane displacement solution of a semi-infinite plane model is obtained experimentally . which shows good agreement with that by finite element method.