G100034 A Study of Damage Detection for Structures : Dynamic Characteristics of Structure Material with Damage

Abstract

It is important for structure and machine maintenance to detect the damage location and to evaluate the level of damage at that point. To understand the relation between natural frequency, in this paper, damping ratio and steel structural component with damage, dynamic characteristics of structure component was investigated by vibration test. Comparing between specimen with damage and without damage, natural frequency and damping ratio indicates change clearly. Damping ratio depends on the damage location, it becomes large value as the damage location approaches a lower position. And damping ratio of specimen with heavily damage indicates smaller to slight one.