摘要
本篇文章乃是在於探討四邊均為簡支邊界之複合材料薄板，當其板面挖有多個不同形狀之孔洞，並考慮阻尼效應對其運動方程式之建立及自由振動頻率值變化之研究。
對於過去文獻及其他學長們的論文中，雖然也有使用有限元素法或有限差分等數值方法，來處理類似挖有孔洞的問題，但多數都集中在均質材料板、或者是孔洞數不多、孔洞形狀只侷限於單一形狀…等。
本篇主要是對『Ectoplasm』方法來作研究，並應用在複合材料上，概念為貼一層很薄的薄膜，以變厚度模擬孔洞部分，如此一來可視為處理板為變厚度的振動問題。
本文探討了許多不同形狀之板孔、不同孔洞大小、不同孔洞個數、不同纖維層積方向、不同層合板層數對複合材料孔板自然頻率之影響，並考慮阻尼效應，及加入激振力對不同孔洞板作響應及頻譜分析，以了解含洞複合材料板之振動特性。

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