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Structural Engineering and Mechanics Volume 40, Number 4, November25 2011 , pages 501-515 DOI: https://doi.org/10.12989/sem.2011.40.4.501 |
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A study on transverse vibration characteristics of a sandwich plate with asymmetrical faces |
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Namshik Ahn and Kangsu Lee
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| Abstract | ||
| Sandwich elements have high flexural rigidity and high strength per density. They also have excellent anti-vibration and anti-noise characteristics. Therefore, they are used for structures of airplanes and high speed ships that must be light, as well as strong. In this paper, the Reissner-Mindlin\'s plate theory is studied from a Hamilton\'s principle point of view. This theory is modified to include the influence of shear deformation and rotary inertia, and the equation of motion is derived using energy relationships. The theory is applied to a rectangular sandwich model which has isotropic, asymmetrical faces and an isotropic core. Investigations are conducted for five different plate thicknesses. These plates are identical to the sandwich plates currently used in various structural elements of surface effect ships (SES). The boundary conditions are set to simple supports and fixed supports. The elastic and shear moduli are obtained from the four-point bending tests on the sandwich beams. | ||
| Key Words | ||
| sandwich; plate; transverse; vibration; asymmetric faces; FRP | ||
| Address | ||
| Namshik Ahn: Department of Architectural Engineering, Free Form Architecture Institute, Sejong University, Seoul 143-747, Korea Kangsu Lee: Korean Register of Shipping, Green and Industrial Technology Center, Daejeon 305-343, Korea | ||