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Structural Engineering and Mechanics   Volume 12, Number 2, August 2001, pages 189-200
DOI: http://dx.doi.org/10.12989/sem.2001.12.2.189
 
Modal analysis of perforated rectangular plates in contact with water
Kyeong-Hoon Jeong, Byung-Ki Ahn and Seong-Cheol Lee(Korea)

 
Abstract     [Full Text]
    This paper presents an experimental modal analysis of perforated rectangular plates in air or
in contact with water. The penetration of holes in the plates had a triangular pattern with P/D (pitch to
diameter) 2.125, 2.500, 3.000 and 3.750. The plate was clamped along the plate edges by a number of
bolts and nuts. The natural frequencies of the perforated plates in air were obtained by the analytical
method based on the relation between the reference kinetic and maximum potential energies and
compared with the experimental results. Good agreement between the results was found for the natural
frequencies of the perforated plates in air. Additionally, it was empirically found that the natural
frequencies of the perforated plate in air increase with an increase of P/D, on the other hand, the natural
frequencies of the perforated plate in contact with water decrease with an increase of P/D.
 
Key Words
    experimental modal analysis; fluid-structure interaction; perforated plate; added mass; clamped boundary condition; rectangular plate; triangular hole pattern; natural frequency; free vibration.
 
Address
Kyeong-Hoon Jeong, Korea Atomic Energy Research Institute, P.O. Box 105, Yusong, Taejon 305-600, Korea
Byung-Ki Ahn and Seong-Cheol Lee, Department of Mechanical Engineering, Chonbuk National University, Chonju, Chonbuk 560-756, Korea
 

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