油漩、油顫與乾顫之振動響應訊號之研究

以作者查詢圖書館館藏

、以作者查詢臺灣博碩士

、以作者查詢全國書目

、勘誤回報

、線上人數：55

、訪客IP：3.142.53.151

姓名

許哲瑋(Jhe-Wei Syu) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

油漩、油顫與乾顫之振動響應訊號之研究
(Study of Start-up Vibration Response for Oil Whirl, Oil Whip and Dry Whip)

相關論文

★ TFT-LCD前框卡勾設計之衝擊模擬分析與驗證研究	★ TFT-LCD 導光板衝擊模擬分析及驗證研究
★ 數位機上盒掉落模擬分析及驗證研究	★ 旋轉機械狀態監測-以傳動系統測試平台為例
★ 發射室空腔模態分析在噪音控制之應用暨結構聲輻射效能探討	★ 時頻分析於機械動態訊號之應用
★ VKF階次追蹤之探討與應用	★ 火箭發射多通道主動噪音控制暨三種線上鑑別方式
★ TFT-LCD衝擊模擬分析及驗證研究	★ TFT-LCD掉落模擬分析及驗證研究
★ TFT-LCD螢幕掉落破壞分析驗證與包裝系統設計	★ 主動式火箭發射噪音控制使用可變因子演算法
★ 醫學/動態訊號處理於ECG之應用	★ 光碟機之動態研究與適應性尋軌誤差改善
★ 具新型菲涅爾透鏡之超音波微噴墨器分析與設計	★ 醫用近紅外光光電量測系統之設計與驗証

檔案

[Endnote RIS 格式]

[Bibtex 格式]

[相關文章]

[文章引用]

[完整記錄]

[館藏目錄]

[檢視]

[下載]

本電子論文使用權限為同意立即開放。
已達開放權限電子全文僅授權使用者為學術研究之目的，進行個人非營利性質之檢索、閱讀、列印。
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。

摘要(中)

流體膜軸承的不穩定(如油顫)所引發的自激振動會使機台造成零件鬆脫或毀損，更嚴重的是其會引發次現象─乾顫，會使機台造成破壞。這些不穩定的特徵都藏在轉速從零上升到額定轉速的訊號之中。在本論文HHT被應用來說明不穩定的特徵頻率，在Hilbert譜上清楚的呈現不穩定。但是乾顫並不能在Hilbert譜上面被觀察到，所以發展了全Hilbert譜，可以檢測出乾顫的徵兆。經由以上的分析後，更加了解訊號中的不穩定的特徵，因此希望可以有可以抑制不穩定的方法。本論文發現軸中心線是一個不錯的控制指標，每個機械故障都會影響而改變軸中心線的位置，所以軸中心線的位置加上可接受的範圍即可以很好的解釋軸承所發生的現象，在依各現象做出適當的控制，讓機台的運轉效率更佳。

摘要(英)

Oil whip induces self-excited vibration in fluid-handling machines, and what is worse, it can cause self-excited reverse precessional full annular rub, known as “dry whip” which is a secondary phenomenon resulting from a primary cause and may lead to a catastrophic failure of machines; that is, “coincidence of oil whip and dry whip” that occurs repeatedly with constant frequency and amplitude in small clearance cases of fluid-handling machines. The clues of these instabilities are hidden in startup vibration signals of this kind of machine. Hilbert-Huang Transform is applied for instability interpretation. The instability can be clearly indicated by using Hilbert spectrum, but the malfunction like dry whip cannot be observed by it. Therefore, in this paper, first, the Full Hilbert Spectrum (FHS) is developed to illustrate the symptoms of dry whip. Next, the position of shaft centerline within an acceptance region (AR) is introduced to predict and prevent instability at an early stage. Thus, the transition from stability to instability in rotor systems can be completely understood. This is a good notion to demonstrate how a rotor system changes from a stable to an unstable state. These findings can help engineers to predict and prevent the instability in turbo-generator.

關鍵字(中)

★ 可接受範圍
★ HHT
★ 乾顫
★ 油顫
★ 油漩

關鍵字(英)

★ Rub
★ Hilbert Huang Transform
★ Acceptance Region
★ Whip
★ Whirl

論文目次

摘要 II
Abstract III
LIST OF FIGURES VII
LIST OF TABLES VIII
Chapter 1 Introduction 1
1.1 Research Background and Motivation 1
1.2 Literature Review 3
1.3 Scope of the Thesis 7
Chapter 2 Theoretical Basis 8
2.1 Basic Concepts 8
2.1.1 Timebase Plot and Keyphasor Event 8
2.1.2 Rotation, Precession and Orbit Plot 10
2.1.3 Fluid-Induced Instability 15
2.1.4 Rub 18
2.2 Hilbert Huang Transform 24
2.3 Full Spectrum 29
2.4 Acceptance Region 34
Chapter 3 Experimental Setup and Test Procedure 37
3.1 Experimental rotor rig. 37
3.2 Test Procedure 39
Chapter 4 Signal Analysis and Interpretation 41
4.1 Using Hilbert-Huang Transform 41
4.2 Using Full Spectrum 47
4.3 Using Acceptance Region 50
4.4 Vibration Categories and Stability Analyses 54
4.5 Vibration V.S. Shaft Centerline with Acceptance Region 58
4.6 Conclusion 58
Chapter 5 Conclusion and Future Works 59
5.1 Conclusion 59
5.2 Future works 59
References 61

參考文獻

[1] N.E. Huang, and Z. Shen, 1998, “The empirical mode decomposition and the Hilbert Spectrum for non linear non-stationary time series analysis,” Proceeding of the Royal Society, London, Vol. A 454, pp. 903:995.
[2] N.E. Huang, 1993, “A new view of nonlinear water waves: The Hilbert spectrum,” Annual Review of Fluid Mechanicals, Vol. 31, pp. 417-457.
[3] P. Goldman and A. Muszynska, 1987, “Application of full spectrum to rotating machinery diagnostics,” Orbit, August.
[4] D.E. Bently, and C.T. Hatch, 2002, “Fundamentals of rotary machinery diagnostics,” Bently Pressurized Bearing Company Minder NV.
[5] A. Muszynska, 2005, “Rotordynamics,” CRC Taylor & Francis Group, Boca Raton, London.
[6] H. Rylander, M. Carlson, and C. Lin, 1995, “Actively controlled bearing surface profiles theory and experiments,” Tribology Symposium, Vol. 73, pp. 1-10.
[7] I.E. Santos, and R. Nicoletti, 1996, “Self-excited vibrations in active hydrodynamic bearings,” Journal of the Brazilian Society of Mechanical Sciences and Engineering, Vol. 18, pp. 263-272.
[8] Q. Tan, W. Li, and B. Liu, 2002, “Investigations on a permanent magnetic- hydrodynamic hybrid journal bearing,” Tribology International, Vol. 35, pp. 443-448.
[9] D.C. Deckler, R.J. Veillette, M.J. Braun, and F.K. Choy, 2004, “Simulation and control of an active tilting-pad journal bearing,” Tribology Transactions, Vol. 47, pp. 440-458.
[10] Z. Cai, M.S. de Queiroz, and M.M. Khonsari, 2004, “On the active stabilization of tilting-pad journal bearings,” Journal of Sound and Vibration, Vol. 273, pp. 421-428.
[11] D.E. Bently, and C.T. Hatch, 2006, “Shaft levitation made simple,” Turbomachinery International, Vol. 47, pp. 30-32.
[12] A.S. Das, M.C. Nighil, J.K. Dutt, and H. Irretier, 2008, “Vibration control and stability analysis of rotor-shaft system with electromagnetic exciters,” Mechanism and Machine Theory, Vol. 43, pp. 1295-1316.
[13] J.L. Jr. Lawen, and G.T. Flowers, 1999, “Interaction Dynamics Between a Flexible Rotor and an Auxiliary Clearance Bearing,” Journal of Vibration and Acoustics, Vol. 121, pp. 183–189.
[14] A. Muszynska, 1984, “Rotor/Seal Full Annular Rub, Senior Mechanical Engineering Seminar,” Bently Nevada Corporation, Carson City, NV.
[15] A. Muszynska, 1989, “Rotor-to-Stationary Element Rub-Related Vibration Phenomena in Rotary Machinery,” Literature Survey, Shock and Vibration Digest, Vol. 21, pp. 3–11.
[16] A. Lingener, 1990, “Experimental Investigation of Reverse Whirl of a Flexible Rotor,” IFToMM Third International Conference on Rotordynamics, Lyon, France, pp. 13–18.
[17] S. Crandall, 1990, “From Whirl to Whip in Rotordynamics,” IFToMM Third International Conference on Rotordynamics, Lyon, France, pp. 19–26.
[18] D. Childs, 1993, “Turbomachinery Rotordynamics: Phenomena, Modeling, and Analysis,” John Wiley and Sons, New York.
[19] J.J. Yu, P. Goldman, D.E. Bently, and A. Muzynska, 2002, “Rotor/seal experimental and analytical study on full annular rub,” Journal of Engineering for Gas Turbines and Power, Vol. 124, pp. 340-350.
[20] X.Y. Shen , J.H. Jia, M. Zhao, and J.P. Jing, 2008, “Numerical and experimental analysis of the rotor-bearing-seal system,” Proceedings of the Institution of Mechanical Engineers Part C-Journal of me, Vol. 222, pp. 1435-1441.
[21] C.H. Chen, C.P. Li and T.L. Teng, 2002, “Surface-wave dispersion measurements using Hilbert-Huang transform,” Terrestrial, Atmospheric and Ocean sciences, Vol. 13, pp. 171-184.
[22] M.E. Montesinos, J.L. Munoz-Coboa, C. Perez, 2003, “Hilbert-Huang analysis of BWR neutron detector signals: application to DR calculation and to corrupted signal analysis,” Annals of Nuclear Energy, Vol. 30, pp.715-727.
[23] D.J. Pines and L.W. Salvino, 2002, “Health monitoring of one-dimensional structures using empirical mode decomposition and the Hilbert-Huang transform,” Smart Structures and Materials, pp. 127-143.
[24] S.C. Philips, R.J. Gledhill, J.W. Essex and C.M. Edge, 2003, “Application of the Hilbert-Huang transform to the analysis of molecular dynamic simulations,” Journal of Physical Chemistry, Vol. A 107, pp. 4869-4876.
[25] H.F. Black, 1968, “Interaction of a Whirling Rotor with a Vibration Stator Across a Clearance Annulus,” Journal of Mechanical Engineering, Vol. 10, pp. 1-12.
[26] Y. S. Choi, 2000, “Experimental Investigation of Partial Rotor Rub,” KSME International Journal, Vol. 14, pp. 1250-1256.
[27] Z. K. Peng, 2005, “Detecting of the Rubbing-caused Impacts for Rotor-stator Fault diagnosis using reassigned Scalogram,” Mechanical System and Signal Processing, Vol. 19, pp. 391-409.
[28] D. Yu, J. Cheng and Y. Yang, 2005, “Application of EMD method and Hilbert spectrum to the fault diagnosis of roller bearing,” Mechanical Systems and Signal Processing, Vol. 19, pp. 259-270.
[29] G. Gai, 2006, “The processing of rotor startup signals based on empirical mode decomposition,” Mechanical Systems and Signal Processing, Vol. 20, pp. 222-235.
[30] K. Qi, Z. He and Y. Zi, 2007, “Cosine window-based boundry processing method for EMD and its application in rubbing fault diagnosis,” Mechanical Systems and Signal Processing, Vol. 21, pp. 2750-2760.
[31] T.H. Patel and A.K. Darpe, 2009, “Study of coast-up vibration response for rub detection,” Mechanism and Machine Theory, Vol. 44, pp. 1570-1579.

指導教授

潘敏俊(Min-Chun Pan)

審核日期

2010-8-10

推文