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研究生:鄧文明
研究生(外文):Van-Minh Dang
論文名稱:數值控制工具機系統的模態與動力學分析
論文名稱(外文):The Modal and Dynamic Analysis of CNC Machine Tools System
指導教授:黃運琳黃運琳引用關係
學位類別:碩士
校院名稱:國立虎尾科技大學
系所名稱:創意工程與精密科技研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2016
畢業學年度:104
語文別:英文
論文頁數:100
中文關鍵詞:振動模態分析有限元素分析動態響應拓樸最佳化。
外文關鍵詞:Vibrationmodal analysisFinite element analysisDynamic analysisTopology optimization.
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本篇論文旨在展現當今虛擬工具機技術研究的進程,以及現行相關研究中將可能面對的瓶頸與挑戰。本論文採行有限元素法(Finite Element Method, FEM)為整體數值控制工具機做結構性分析,並揭示實驗過程中,所採行的測量及計量之方法。本研究中,以探討多種研究範例,探討多個機械元件中元素的最佳化方法與動態分析。本論文中呈現出輸出控制端、切削之情況以及數值控制工具機之結構等,三者於實驗中之交互關係。機械之多體動力模型(Multi-body dynamic models)將使機械之多重動態模擬得以整合,動態結構與控制之手段將於文中作探討。以多個研究範例作為示範,以展現數值控制工具機、控制裝置以及切削程序中所出現之干擾與阻礙,並探討三者之交互關係。本文以ANSYS軟體作為模擬之平台,用來模擬機械之運作情形並表現其對機械動力之影響。模擬結束後,即可判斷兩種分析軟體模擬之精確度 (ANSYS和FEMAP)。 簡言之,本論文將使用RerurDyn軟體模擬數值控制工具機之工具範例。本論文中,將比對過去以及現今之相關研究內容以及研究中所面對之種種挑戰,並在最後做出研究總結,以便於未來能實現完全數位化之數值控制工具機。

This thesis is aimed to presents current state of Virtual Machine Tool Technology and related ongoing research challenges. The structural analysis of CNC machine tools using Finite Element models and their experimental calibration techniques are presented. The kinematic analysis and optimization of machine elements are discussed with sample examples. The interaction between the control of the feed drives, cutting conditions and machine tool structure is presented. Multi-body dynamic models of the machine, which allow integrated simulation of machine kinematics, structural dynamics and control techniques, are discussed. The interaction between the CNC machine tools, controller and cutting process disturbances are discussed with sample examples.
ANSYS software will be used for the simulation of machining operation and its impact on the dynamics of the machine. Afterward, the accuracy between ANSYS and FEMAP will be given out. To sum up, some toolkit examples associated with CNC machine tools will be simulated by RerurDyn software. The thesis presents both the summary of current and past research, as well as research challenges in order to realize a fully digitized model of the CNC machine tools.


Abstract......1
摘要......2
Acknowledgements......3
Table of Content......4
List of Tables......8
List of Figures......9
Nomenclatures......12
Chapter 1: Introduction......15
1.1 The virtual machine tool......15
1.1.1 Integrated design of modern machine tools......16
1.1.2 Optimization of the kinematic behavior......17
1.1.3 Simulation of rigid multi-body models......18
1.1.4 Finite Element Analysis of machine tools......20
1.1.5 Optimization of structural components......21
1.1.6 Coupled Simulation of structural dynamics and control loops of machine tools......23
1.2 Machine tool vibration......24
1.2.1 Vibration due to inhomogeneities in the workpiece......24
1.2.2 Vibration due to cross-sectional variation of removed material......25
1.2.3 Disturbances in the workpiece and tool drivers......25
a. Vibration Caused by Rotating Unbalanced Members......25
b. Marks Caused by Inhomogeneities in the Grinding Wheel......26
c. The Effect of Vibration on the Wheel Properties......27
d. Drives......28
e. Bearings......30
f. Guideways (Slides)......31
1.2.4 Vibration transmitted from the environment......32
1.3 Machine tool chatter......33
1.3.1 Dynamic stability......35
1.3.2 The effect of vibration on tool life......36
1.3.3 Vibration control in machine tools......36
1.3.4 Stiffness......36
1.3.5 Damping......45
Chapter 2: Theory and Introduction to ANSYS, FEMAP and RecurDyn Softwares......49
2.1 D’Alembert’s principle......49
2.2 Virtual work principle......50
2.3 Introduction to ANSYS......51
2.3.1 ANSYS operations......52
2.3.2 ANSYS analysis types......53
2.4 Introduction to FEMAP......55
2.4.1 Import or create geometry......56
2.4.2 Build a Finite Element Model......56
2.4.3 Checking model......56
2.4.4 Analyzing model......57
2.4.5 Post-process results......57
2.4.6 Document results......58
2.5 Introduction to RecurDyn......58
2.5.1 Operated modules......60
2.5.2 Software features......61
Chapter 3: Static and Modal Analysis of Machine Tools......62
3.1 Structural rigidity......63
3.2 Dynamic rigid structure......63
3.3 Real and CAD models of machine tools......63
3.4 Static and modal analysis of machine tools......64
Chapter 4: Modal Analysis of Equivalent Structure of Machine Tools......73
4.1 Modal analysis of the cantilever beam......73
4.1.1 Problem specification......73
4.1.2 Modal analysis of the cantilever beam used ANSYS and FEMAP......74
4.1.3 Comparison with Euler-Bernoulli Theory......76
4.2 Modal analysis of the plate......77
4.2.1 Normal modes analysis ......77
4.2.2 Modal analysis of the cantilever plate......78
Chapter 5: RecurDyn Toolkits Used on Machine Tools......83
5.1 Ball bearing toolkit......83
5.2 Tire toolkit......92
5.2.1 Tire kinematics......92
5.2.2 Set contact and run simulation......94
Chapter 6: Summary and Conclusion......98
6.1 Summary......98
6.2 Conclusion......105
6.3 Future Studies......106
References......107
Extended Abstract......111

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