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  • 學位論文

微動平台結構之動態特性分析

Dynamic Analysis for a Piezo-driven Microstage Structure

指導教授 : 丁鏞

摘要


摘要 本論文研究探討高頻操作之奈米切削設備結構剛性及動態特性分析。針對奈米切削設備之挾持刀具基座、微動平台、導螺桿滑座各個結構分別單獨分析,再將次結構組合成整機予以分析,將使用有限元素法(Finite Element Method)之ANSYS軟體探討其共振頻率、模態振型、動剛度等動態特性。研究內容包括利用Block Lanczos Method進行模態分析及量測材料的自由振盪衰退率將與使用ANSYS暫態分析比較後求得阻尼係數,最後使用模態疊加法(Mode Superposition)進行簡諧分析,以驗證微動平台是否達到符合壓電致動器位移方向所需之模態振型及整機動態的結構剛性是否足夠。

並列摘要


Abstract The purpose of this study is to discuss the structural rigidity and dynamic analysis of high-frequency nanoscale cutting system. Nanoscale cutting system contains three substructures, includes fixed tools base, micro positioning stage and ball screw stage. ANSYS software with the finite element method is used to analyze each substructure separately and complete nanoscale cutting structure. Resonant frequency, mode shape, dynamic stiffness and dynamic analysis are investigated and discussed. Modal analysis is carried out by using Block Lanczos Method to create the model. The rate of decay of oscillation of the material is measured from the experiment. Appropriate damping coefficient is found by comparing the simulation and experimental result through transient analysis. Harmonic analysis of Mode Superposition is used to verify the displacement direction of the micro positioning stage with the chosen mode shape that is suitable to piezoelectric actuator, and the structure stiffness of the entire system is satisfactory.

參考文獻


[13] 張清圳,“機床結構動態特性分析與優化設計”,中原大學, 機械工程研究所, 碩士論文, 2004.
[15] 呂俊弦,“工具機結構設計與動態性能優化”,中原大學, 機械工程研究所, 碩士論文, 2001.
[16] 翁嘉駿,“工具機動件結構最佳化設計與分析”,中原大學, 機械工程研究所, 碩士論文, 2005.
[18] 蘇崑熙,“使用ANSYS之機械結構動態分析”,中原大學, 機械工程研究所, 碩士論文, 2003.
[19] 曾淵鱗,“高速內孔磨床結構動態優化設計”,中原大學, 機械工程研究所, 碩士論文, 2001.

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