Projected Grid Moire Techniques for Deflection Measurements of Dynamic Applications

摘要

Projected grid moire methods have potential advantages over other deflection measurement techniques because they are full-field and noncontacting. However, these techniques had not been applied to dynamic problems. Such methods have now been developed and were used to measure deflections of rotating propellers with good success and plates subject to blasts with limited success. Comparisons with analytical results show good agreement when quality photographs of the moire fringe patterns are produced. (Author)