| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 94 === The purpose of this paper is to study the vibration characteristic of a spinning annular plate with disordered of mistuned beam-stiffeners. First, via the principle of energy, we derive the equations of motion of the rotating beam and plate. Galerkin’s method is then employed to discretize the equation. The receptance method follows to join the rotating beam and plate, and yield the natural frequencies and mode shapes.
In this paper the beams reinforcement one-side on the plate. Numerical results for three combine situation, perfect, with disordered or mistuned. In the same time, analyze the system’s change of natural frequencies and mode shape. Finally, parametric studies of systems are conducted. The results show that adequate number of beams do stiffen the spinning plate. But a mistuned beam has caused frequencies bifurcation. A mistuned beam has caused frequencies increase and decrease when mistuned error was raised or downed. All the results are well interpreted and illustrated from physical viewpoint.
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