Identification of Rigid Body Properties of the Mounted Structure with Improved Mass-Lines from Impact Hammer Tests

탄성지지된 구조물의 충격 햄머 실험에서 질량선의 개선을 통한 향상된 강체 특성 규명법

There are many researches to identify the rigid body properties from the mass-line obtained by impact hammer testing. The correct rigid body properties of the structure may be estimated if the mass-line of the structure could be obtained exactly. When the structure is mounted by elastic materials, the mass-line cannot be read correctly from the impulse response spectrum. The reason is due to the effects of rigid body modes of mounted structure. In this paper, the effects of rigid body modes of mounted structure to the mass-line are discussed and the method to remove these effects is also presented.