音柱在整個小提琴結構中雖只占其中一小部份，但對於小提琴振動有著深遠的影響。一個微小的改變，都可能造成小提琴的音質產生遽變。而在討論之前，本文將詳細說明小提琴電腦模型的建立過程。在本研究中，利用電腦有限元素法模擬由Moral 和Jansson(1982)發表的小提琴振動實驗，分別探討音柱位置與材料含水率兩個主題，比較不同位置與不同含水率時，驅動點導納圖中的差異性。分析結果顯示，當音柱靠近或遠離音孔時，對低頻的響應影響較大；當音柱靠近或遠離琴橋時則是對高頻影響較大。而在含水率的結果中，顯示木材纖維方向的楊氏係數在模擬中有較大的影響力。

Soundpost has significant influence on the violin vibration, although it is a small element in the violin structure. The tonal will be extremely changed when the soundpost is differently arranged such as its position or the moisture in material. Before discussion, the process of establishing three dimensional violin model will be described in detail. We then perform the finite element analysis to simulate the violin vibration experiment done by Moral and Jansson. The effects of the position and the moisture content in the soundpost on driving point mobility will be discussed in our research.
The result shows that only the mobility in lower frequency be affected when soundpost position is moved towards or away from the f hole. On the contrary, the mobility in higher frequency will be affected, when the position is shifted towards or away from the bridge. Among all material properties of wood, the Young’s modulus along fiber direction plays an important role in discussion mobility when the moisture contend is concerned.

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