Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/91281
標題: A Study on the Structural Parameters of Joint Interface
接合界面結構參數辨識之探討
作者: 李萱
Hsuan Lee
關鍵字: joint interface;modal testing;parameter identification;finite elementmodel;接合界面;模態測試;參數辨識;有限元素模型
引用: [1] C. F. Beards, 'The damping of structural vibration by controlled interfacial slip in joints,' ASME Publication, 81-DET-86, 1986. [2] J. Kim, J. C. Yoon and B. S. Kang, 2007, 'Finite Element Analysis and Modeling of Structure with Bolted Joints,' Applied Mathematical Modelling, Vol. 31, No 5, PP. 895-911. [3] J. H. Wang and S. B. Horng, 'Investigation of The Tool Holder System With a Taper Angle 7:24,' International Journal of Machine Tool & Manufacture, Vol. 34, No. 8, Nov 1994, PP.1163-1176. [4] 劉連富,'螺栓接合界面之模擬和實驗驗證',國立中興大學機械工程研究所碩士學位論文,民國91年6月。 [5] 簡建宏,'螺栓接合界面之簡易模擬方法和驗證',國立中興大學機械工程研究所碩士學位論文,民國91年6月。 [6] 王栢村、謝宗廷、陳正陽、周芳俊,'工具機螺栓接合面之模型驗證',中華民國振動與噪音工程學會論文集,(2011),190-196頁。 [7] D. J. Ewins, 'Modal Tseting:Theory and Practice,' Research Studies Press Ltd. England, 1984. [8] 王柏村,1998,'實驗模態分析',課程講義,屏東。 [9] D. Brown, 'Weakness of Impact Testing,' Proceedings of the 15th IMAC, Orlando, FL, 1997, PP. 1672–1676 [10] P. A. Blelloch, 'Direct Correlation of Test-Analysis Cross-Orthogonality,' Proceedings of the 10th International Modal Analysis Conference, San Diego CA, Feb. 1992. [11] T. Ting, T. L. C. Chen and W. Twomey, 'Correlating Mode Shapes Based on the Modal Assurance Criterion,' Mechanical Systems and Signal Processing, 21 (4) (2007), PP. 1690-1703. [12] 王鐘鼎,'使用實驗模態數據驗證和修正有限元素模型',國立中興大學機械研究所碩士學位論文,民國81年5月。 [13] Y. Ren and C. F. Beards, 'Identification of Joint Properties of a Structure Using FRF Data,' Journal of Sound and Vibration, 186(4) (1995), PP. 567-587. [14] T. Inamura and T. Sata, 'Stiffness and Damping Identification of the Elements of a Machine Tool Structure,' CIRP Annuals, Vol. 28, No. 1, pp. 235-239 (1979). [15] 張宇、廖伯瑜,'機床結合部參數的有效識別方法',昆明理工大學學報,1998,23.2: 152-157。
摘要: 
The correctness of simulating results from the finite element analysis software is closely related to the way to define the joint interface between structures. In this study, aim to get the closely result of experiment and simulation, we do modal testing and simulation and compare the results of the experiment and simulation for the single structure. After confirming the results of the simulation and experiment are similar, doing modal testing of the combined structure and repeat the experiment after changing the conditions of joint interface. We can get the equivalent stiffness and damping matrices of joint interface by using the method of parameter identification. Finally, substitutes the matrices into the contact condition of finite element analysis model to do the analysis.
During the calculation of the parameter identification formula, it's been found that is not necessary to measure whole structure to get the parameters of joint interface but only measure specific position of the structure. After the experimental of measure, the parameters of joint interface can be get through the appropriate formula.
According to the results of the experiment and simulation in this study, there have larger error between simulation and experiment if we simplify joint interface directly during the finite element analysis. We should consider the contact way of the joint interface being the basis to choose appropriate contact condition in the finite element analysis, so that we can get the closely result of experiment and simulation. We can also know that if the form of design structure is satisfy the design requirement or not by the experiment and simulation of changing the contact condition.

結構與結構間的接合界面如何設定,與有限元素分析軟體的模擬結果是否正確密切相關。本研究先透過針對單一結構進行模態實驗與模擬,並比對試件的實驗與模擬結果;確認實驗與模擬結果相符後,再進行組合結構的模態實驗,改變接合界面的結合條件,依序進行實驗,並透過接合界面參數辨識方法進行參數辨識後,得到結合界面的等效剛性與阻尼矩陣,並依此代入有限元素分析軟體進行分析,使模擬結果更趨於實驗結果。
在接合界面參數辨識的公式計算過程中可發現,並不需要對整體結構進行量測,只須量測單一結構與組合結構在接合界面連接點位置的頻率響應函數,透過適當參數辨識方法,即可獲得結合界面的特性參數。
由本研究的實驗與模擬結果可看出,在有限元素分析模型的簡化過程中,直接將接合界面進行簡化,其模擬結果會與實際產生較大的誤差,應考慮接合界面的狀況,選擇適當的接觸條件進行模擬分析,其模擬結果較為趨近實驗結果,同時透過改變接合條件的實驗與模擬可看出,設計之結構的接合面狀況是否符合設計的需求。
URI: http://hdl.handle.net/11455/91281
Rights: 同意授權瀏覽/列印電子全文服務,2018-02-06起公開。
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