주파수 전달함수를 이용한 신 포괄 곡선맞춤법
New Global Curve-Fitting Method Using Frequency Response Function
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초록
Several damping materials have been employed to reduce the vibration of structures. While it is important to estimate the damping matrix when analyzing damped composite structures using the finite element method (FEM), at present, there is no FEM program that can correctly estimate the damping matrix. In this paper, a new global curve-fitting method is proposed for identifying the system parameters of non-proportional damping structures using a frequency response function. An experimental test for a cantilever beam attached damping material was carried out to verify the performance of the method proposed in this study.
Abstract
Several damping materials have been employed to reduce the vibration of structures. While it is important to estimate the damping matrix when analyzing damped composite structures using the finite element method (FEM), at present, there is no FEM program that can correctly estimate the damping matrix. In this paper, a new global curve-fitting method is proposed for identifying the system parameters of non-proportional damping structures using a frequency response function. An experimental test for a cantilever beam attached damping material was carried out to verify the performance of the method proposed in this study.
참고문헌 (8)
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- 민천홍, "비선형 최소제곱법을 이용한 점탄성 감쇠를 갖는 원통셸의 실험진동해석", 한국해양공학회지, 22(3), pp.41~46 (2008), 한국해양공학회
- Ewins, D.J., "Modal Testing 2" (2000), Research Studies Press Ltd
- Lee, J.H., "Identification of Damping Matrices form Measured Frequency Response Functions", Journal of Sound and Vibration, 240(3), pp.545~565 (2001)
- Maia, N., "Theoretical and Experimental Modal Analysis" (1997), Research Studies Press Ltd.
- Peeters, B., "The PolyMAX Frequency-domain Method: A New Standard for Modal Parameter Estimation?", Shock and Vibration, 11, pp.395~409 (2004)
- Phani, A.S., "Viscous Damping Identification in Linear Vibration", Journal of Sound and Vibration, 303, pp.475~500 (2007)
- Pilkey, D.F., "An Iterative Approach to Viscous Damping Matrix Identification", Proceedings of the 15th International Modal Analysis Conference, pp.1152~1157 (1997), Society for Experimental Mechanics, Inc.