本研究應用接納法(receptance method)模擬電腦硬碟機之多疊圓板振動特性，將硬碟之多層碟片模擬成多疊圓板，並將讀寫頭與懸臂之特性模擬成單點彈簧耦合圓板。以期探討硬碟機發生碟片厚度失調或讀寫頭懸臂勁度失調所產生之影響。
文中首先探討旋轉單圓板之動態特性，續以接納法求得完美協調多疊旋轉圓板系統之固有模態，最後探討系統圓板厚度失調與彈簧勁度失調，並分析其固有頻率與固有模態。經數值結果得知失調將改變系統之固有頻率與固有模態，並產生模態局部化(mode localization)與模態轉換(mode exchange)之特殊現象，文中探討發生此現象之原因，並對所得結果以物理觀點解釋之。

The purpose of this paper is to study the vibration analysis of stacked disks with spring and thickness mistunes. First, via the principle of energy, we derive the equation of motion of a spinning circular plate. Galerkin’s method is then employed for an approximate solution of the spinning circular plate. The receptance method follows to join the spinning circular plates(discs) and the springs(stiffness of read/write head and cantilever), and obtain the natural frequencies and mode shapes of stacked disks system.
Numerical results for three combine situation, perfect, with spring mistune, with thickness mistune. The results show that mistunes can produce a change in the natural frequencies and natural mode of system. Besides, the natural modes occur mode localization and mode exchange as the system with thickness mistune. These phenomena are illustrated in various figures, and they are explained from both physical and mathematical points of view.

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