2012•The Proceedings of Conference of Kanto BranchOpen access

1824 A fundamental on dynamic behavior of structural material with damage using the forced vibration.

Katsumi KURITA, Shigeru Aoki, Kazuki Fujimoto

Abstract

In order to understand vibration characteristics of specimen with damage, excitation experiment was done using steel pipe Comparing between specimen with damage and without damage, natural frequency and damping ratio indicates change clearly In the case that damage is located at lower part area, natural frequency is becoming lower, damping ratio is larger On the other hand, in the case that damage condition is serious, natural frequency indicates lower value, and damping ratio is small It means that it is possible to detect location and condition of damage by natural frequency and damping ratio

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Key concepts: Natural frequency, Vibration, Damping ratio, Materials science, Natural (archaeology), Fundamental frequency, Structural engineering, Aspect ratio (aeronautics)