지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.2
- 수록면
- 99 - 106 (8page)
- DOI
- 10.5050/KSNVE.2021.31.1.099
이용수
초록· 키워드
오류제보하기
For a long time, finite element analysis was widely used as an analytical tool to predict the modal parameters of large civil structures such as frequencies and mode shapes. However, their predicted responses normally do not correlate well with those observed because of the physical uncertainties inherent in the boundary conditions, and material properties that are engaged during the mass and stiffness estimations in the FE model. A modal parameter- or an FRF-based finite element model updating procedure can effectively address the aforementioned issue by varying the structural parameters based on the optimization theory, resulting in a highly reliable FE model. This paper demonstrates how a numerical or mathematical model can be iteratively updated to closely match with the global responses of the physical model. In this study, a slender arch structure for green houses is considered as a test specimen. Using an impulse hammer, an input-output modal test is performed, and its natural frequencies and mode shapes are extracted using an advanced system identification, called PolyMAX. Additionally, the test specimen is numerically modeled using ANSYS and a common in-house program, which can be directly exported to a FE model updating tool. The modal parameters or FRFs extracted from a series of vibration records are used as the reference data for updating the initial finite element model by varying the stiffnesses of the members and base or connection springs in a 3-dofs. Finally, it is found that the updated finite element model shows sufficient improvement in the correlation between the test and analysis results in terms of the modal parameters or FRFs, while the latter case scatters more.
목차
ABSTRACT
1. 서론
2. 충격햄머에 의한 모달실험
3. FE 모델향상
4. 모델향상 결과
5. 결론
References
참고문헌 (15)
참고문헌 신청
Ministry for Food, Argriculture, Forestry and Fisheries, 2008, Standard Design Drawings and Specification for Disaster–Resistant Horiticultural Facilities, 2008-76.
Roux, P., Robertson, A. P. and Motro, R., 1997, The Design of Slender, Monotubular Steel Arches, Structural Engineer, Vol. 75, No. 9, pp. 143~151.
Lurie, A., 1959, Lateral Vibrations as Related to Structural Stability, PhD Thesis, California Institute of Technology, California, USA.
Plaut, R. H. and Virgin, L. N., 1990, Use of Frequency Data to Predict Buckling, Journal of Engineering Mechanics, Vol. 116, No. 10, pp. 2230~2335.
Friswell, M. I. and Mottershead, 1995, Finite Element Model Updating in Structural Dynamics, Kluwer Academic Publishers, Dordrecht, The Netherlans.
Roux, P., Robertson, A. P. and Motro, R., 1997, The Design of Slender, Monotubular Steel Arches, Structural Engineer, Vol. 75, No. 9, pp. 143~151.
Lurie, A., 1959, Lateral Vibrations as Related to Structural Stability, PhD Thesis, California Institute of Technology, California, USA.
Plaut, R. H. and Virgin, L. N., 1990, Use of Frequency Data to Predict Buckling, Journal of Engineering Mechanics, Vol. 116, No. 10, pp. 2230~2335.
Friswell, M. I. and Mottershead, 1995, Finite Element Model Updating in Structural Dynamics, Kluwer Academic Publishers, Dordrecht, The Netherlans.
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