Journal of the Korean Society of Fisheries and Ocean Technology (수산해양기술연구)
- Volume 22 Issue 1
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- Pages.49-57
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- 1986
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- 2671-9940(pISSN)
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- 2671-9924(eISSN)
Free Vibrations of Orthotropic Plates with Variable Thickness
가변 두께를 갖는 직교이방성 평행사변형판의 자유진동 해석
- Heo, Cheol-Weon (National Fisheries University of Pusan) ;
- Moon, Duk-Hong (National Fisheries University of Pusan)
- Published : 1986.03.01
Abstract
The vibrations problem of thin orthotropic skew plates of linearly varying thickness is analyzed using the small deflection theory of plates. Using dimensionless oblique coordinates, the deflection surface can be expressed as a polyonmial series satisfying the boundary conditions. For orthotropic plates which is clamped on all the four edges, numerical results for the first two natural frequencies are presented for various combinations of aspect ratio, skew angle and taper parameter. The properties of material used are one directional glass fibre reinforced plastic GFRP. The results obtained may be summarised as follows: 1. In case of the first mode vibration of plates with increase in the skew angle, the natural frequencies of plates decrease. 2. As the aspect ratio decrease, the natural frequencies of plates decrease. 3. For the identical skew angle, natural frequencies of plates increase with the taper parameter of thickness.
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