Free Vibration Analysis of Two Identical Rectangular Plates Coupled with Fluid

유체로 연성된 동일한 두 직사각 평판의 고유진동 해석

  • Jeong, Kyeong-Hoon (Korea Atomic Energy Research Institute) ;
  • Lee, Seong-Cheol (Division of Mechanical and Aerospace Systems Engineering, Chonbuk National University, Research Center of Industrial Technology) ;
  • Yoo, Gye-Hyoung (Department of Mechanical Engineering, Graduate School of Chonbuk National University)
  • 정경훈 (한국원자력연구소) ;
  • 이성철 (전북대학교 기계항공시스템공학부, 공업기술연구센터) ;
  • 유계형 (전북대학교 대학원 기계공학과)
  • Published : 2002.06.30


In order to investigate the vibration characteristics of fluid-structure interaction problem, we modeled two identical rectangular plates coupled with fluid. A commercial computer code, ANSYS was used to perform finite element analysis and FEM solutions were compared with the experimental results to verify the finite element model. As a result, comparison of FEM and experiment showed good agreement, and the transverse vibration modes, in-phase and out-of-Phase, were observed alternately in the fluid-coupled system. The effect of fluid gap size on the fluid-coupled natural frequency were investigated. It was shown that the mode numbers increased, the normalized natural frequencies monotonically increased. And it was also found that an increase of the fluid gap reduced the coupled natural frequencies for the in-phase modes but increased the coupled natural frequencies for the out-of phase modes, and eventually converged to the results of an infinite fluid gap.


  1. M. K. Kwak, 'Hydroelastic Vibration of Rect- angular Plates,' J. of Applied Mechanics, Vol. 63, pp. 110-115, 1996
  2. 정명조, 정경훈, '갇힌 유체로 연성된 두 원판의 고유진동 해석,' 한국소음진동공학회논문집 Vol. 11, No.9, pp. 439-453. 2001
  3. M. K. Kwak, S. B. Han, 'Effect of Fluid Depth on the Hydroelastic Vibration of Free Edge Circular Plate,' J. of Sound and Vibrations, Vol. 230, No. 1, pp. 171-185, 2000
  4. 정경훈, 이규만, 박근배, 장문회, '유체로 연성된 동일한 두 원판의 모드 해석,' 한국원자력연구소, 2001
  5. 유계형, 정경훈, 이성철, '유체와 연성된 두 직사각 평판의 유한요소 해석,' 한국정밀공학회 추계학술대회 논문집, pp. 668-671,2001
  6. Y. K. Cheung, D. Zhou, 'Coupled Vibratory Cha-racteristics of a Rectangular Container Bottom Plate,' J. of Fluids and Stnictuies, Vol. 14, No. 3, pp. 339-357, 2000
  7. M. K. Kwak, 'Hydroelastic Vibration of Circular Plates,' J. of Sound and Vibrations, Vol. 201, No. 3, pp. 293-303, 1997
  8. K- F. Bauer, W. Eidel, 'Non-Linear Hydro-elastic Vibration in Rectangular Container,' J. of Sound and Vibrations, VoI. 125, No. 1, pp. 93-114, 1988
  9. K. H. Jeong, T. W. Kim, S. Choi, K. B. Park, 'Free Vibration Analysis of Two Circular Disks Coupled with Fluid,' PVP-VoI. 366, pp. 157-164. 1998
  10. P. Kohnke, 'ANSYS Theory Reference, ANSYS Element Reference, ANSYS Command Reference,Release 5.5,' SAS IP, Inc., 1998