Similarity Evaluation Method of Principal Component Mode in Operational TPA to Vibration Mode

Abstract

In this study, we considered a method evaluating whether PC mode obtained by operational TPA PC model has a similarity with a vibration mode of the target structure using only operational data. We then utilized a continuous PC mode shape correlation between the target PC mode and the PC modes at around the target frequency. As the result, the quite different tendency was observed among conditions in which the PC mode is similar with a vibration mode or not. By using this procedure, the similarity could be evaluated well.