Identification of tension distribution of thin plate using vibration characteristics (Validations of identification accuracy by experiment)

Abstract

The flatness of the metal thin plate shape is required in the production lines. Though, the convenient method for measuring small buckles of the thin plate has not been established. The tension distribution corresponding to the strain distribution is occurred by adding the strip running tension to the buckled thin plate. We propose an identification method by using natural frequencies and vibration modes, which are related to tension distributions of thin plate. In this paper, development of experimental equipment and applying the proposed identification method to measured vibration characteristics of a thin aluminum plate is investigated. Then, it shows the results of comparison between the identified tension distribution and directly measured value by the strain gauges. As a result, it is shown that identified tension distributions well corresponded to the values measured by strain gauges.