Vibration studies on some integral rib-stiffened plates

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Abstract

Results from a theoretical and experimental comparison study of the vibrations of four integrally machined rib-stiffened plates are presented. Two plates had one rib-stiffener and two plates had two rib-stiffeners. The finite element method was used for the theoretical predictions and real-time laser holography was used for the experimental verifications. The first twenty-four vibration modes were predicted and measured for each plate, and detailed comparisons are presented. Reasonably good quantitative agreement was obtained in all cases for both frequencies and mode shapes.

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