Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Experimental Modal Analysis of Two Unequal Rectangular Plates Coupled with Fluid

유체로 연성되고 두께가 상이한 두 직사각 평판의 실험적 모드 해석

  • 유계형 (전북대학교 대학원 기계공학과) ;
  • 정경훈 (한국원자력연구소) ;
  • 이성철 (전북대학교 기계항공시스템공학부, 공업기술연구센터)
  • Published : 2002.12.01
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Abstract

In order to study the vibration characteristics of fluid-structure interaction problem, two rectangular plates coupled with bounded fluid were investigated. Experimental modal analyses were carried out to extract the modal parameters of the system. Additionally. finite element modal analyses performed using a commercial computer code, ANSYS. The FEM solutions were compared with the experimental solutions to verify the finite element model. As a result, the comparison between the experiment and FEM results showed excellent agreement. The transverse vibration modes, in-phase and out-of-phase, were observed alternately in the fluid-coupled system. The thickness effect of the plates on the fluid-coupled natural frequencies and mode shapes was investigated for two different cases with the identical thickness and the unequal thickness. It was found that the coupled natural frequencies increase with the thickness for the identical plates regardless of the mode phase. The experimental and the finite element analysis results showed that the out-of-phase mode shapes were deviated from the symmetrical mode shapes in the plate transverse direction fur the unequal plate thickness case.

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References

  1. Minas, C., and Inman, D. J., 1990, 'Matching Finite Element Models to Modal Data,' J. of Vibration and Acoustics, Transaction of the ASME, Vol. 112, Jan., pp. 84-92 https://doi.org/10.1115/1.2930103
  2. Song, S. H., and Jhung, M. J., 1999, 'Experimental Modal Analysis on the Core Support Barrel of Reactor Internals using a Scale Model,' KSME International Journal, Vol. 13, No. 8, pp. 585-594
  3. Kwak, M. K., 1996, 'Hydroelastic Vibration of Rectangular Plates,' J. of Applied Mechanics, Transaction of the ASME, Vol. 63, pp. 110-115 https://doi.org/10.1115/1.2787184
  4. Kwak, M. K., 1991, 'Vibration of Circular Plates in Contact with Water,' J. of Applied Mechanics, Transaction of the ASME, Vol. 58, pp. 480-483 https://doi.org/10.1115/1.2897209
  5. Amabilli, M., Frosali, M., and Kwak, M. K., 1996, 'Free Vibrations of Annular Plates Coupled with Fluids,' J. of Sound and Vibrations, Vol. 191, No. 5, pp. 825-846 https://doi.org/10.1006/jsvi.1996.0158
  6. Jeong, K. H., Ahn, B. K., and Lee, S. C., 2001, 'Modal Analysis of perforated Rectangular Plates in Contact with Water,' Structural Engineering and Mechanics, Vol. 12, No. 2, pp. 189-200 https://doi.org/10.12989/sem.2001.12.2.189
  7. Jeong, K. H., Kim, T. W., Choi, S. and Park, K. B., 1998, 'Free Vibration Analysis of Two Circular Disks Coupled with Fluid,' PVP-Vol. 366, Proceedings, Technologies in Reactor Safety, Fluid-Structure Interacton, Sloshing and Natural Hazards Engineering, pp. 157-164
  8. Jhung, M. J., and Jeong, K. H., 2001, 'Natural Vibration Analysis of Two Circular Plates Coupled with Bounded Fluid,' Transaction of the KSNVE, Vol. 11, No. 9, pp. 439-453
  9. Yoo, G. H., Jeong, K. H., and Lee, S. C., 2001, 'Modal Analysis of Two Rectangular Plates Coupled with Fluid,' Proceedings of the KSME 2001 Spring Annual Meeting A, pp. 556-561
  10. Ewins, D. J., 1986, Modal Testing : Theory and Practice, Research Studies
  11. Kohnke, P., 1998, ANSYS Theory Reference, ANSYS Element Reference, ANSYS Command Reference, Release 5.5, SAS IP, Inc.