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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 張國鎮(Kuo-Chun Chang) | |
dc.contributor.author | Chung-Han Yu | en |
dc.contributor.author | 游忠翰 | zh_TW |
dc.date.accessioned | 2021-05-12T09:35:51Z | - |
dc.date.available | 2018-03-02 | |
dc.date.available | 2021-05-12T09:35:51Z | - |
dc.date.copyright | 2018-03-02 | |
dc.date.issued | 2018 | |
dc.date.submitted | 2018-02-06 | |
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'The dynamic performance of a shear thickening fluid viscous damper.' Journal of the Chinese Institute of Engineers 37.8 (2014): 983-994. 20. C.H. Yu, S.K. Peng, S.J. Wang , F.Y. Yeh, K.C. Chang. 'The Study of Smart Nanofluid Dampers.' The 13th International Workshop on Advanced Smart Materials and Smart Structures Technology, Japan, 2017. 21. Barnes, Howard A., John Fletcher Hutton, and Kenneth Walters. 'An introduction to rheology.' Vol. 3. Elsevier, 1989. 22. P.F.G. Banfill et al. 'Non-Newtonian fluids: Guide to classification and characteristics.' ESDU 97034. HIS ESDU, 2004. 23. Ostwald, Wo, and R. Auerbach. 'Ueber die Viskosität kolloider Lösungen im Struktur-, Laminar-und Turbulenzgebiet.' Colloid & Polymer Science 38.3 (1926): 261-280. 24. Bingham, Eugene Cook. Fluidity and plasticity. Vol. 2. McGraw-Hill, 1922. 25. Herschel, Winslow H., and Ronald Bulkley. 'Konsistenzmessungen von gummi-benzollösungen.' Colloid & Polymer Science 39.4 (1926): 291-300. 26. Casson, N. 'A new flow equation for pigment oile-suspension of the printing ink type.' Rheology of disperse systems (1959). 27. Sisko, A. W. 'The flow of lubricating greases.' Industrial & Engineering Chemistry 50.12 (1958): 1789-1792. 28. Cross, Malcolm M. 'Rheology of non-Newtonian fluids: a new flow equation for pseudoplastic systems.' Journal of colloid science 20.5 (1965): 417-437. 29. Carreau, Pierre J. 'Rheological equations from molecular network theories.' Transactions of the Society of Rheology 16.1 (1972): 99-127. 30. Technical report of American Agency for Toxic Substances and Disease Registry. 'Ethylene glycol and propylene glycol toxicity, what is propylene glycol?' ATSDR, 2012. 31. 'Technical overview: AEROSIL Fumed Silica.' Evonik Resource Efficiency GmbH / Evonik Corporation / Evonik (SEA) Pte. Ltd. 32. Barnes, H. A. 'Shear‐thickening (“Dilatancy”) in suspensions of nonaggregating solid particles dispersed in Newtonian liquids.' Journal of Rheology 33.2 (1989): 329-366. 33. Hoffman, R. L. 'Discontinuous and dilatant viscosity behavior in concentrated suspensions. II. Theory and experimental tests.' Journal of Colloid and Interface Science 46.3 (1974): 491-506. 34. Boersma, Willem H., Jozua Laven, and Hans N. Stein. 'Computer simulations of shear thickening of concentrated dispersions.' Journal of Rheology 39.5 (1995): 841-860. 35. Raghavan, Srinivasa R., and Saad A. Khan. 'Shear-thickening response of fumed silica suspensions under steady and oscillatory shear.' Journal of colloid and interface science 185.1 (1997): 57-67. 36. Helber, R., F. Doncker, and R. Bung. 'Vibration attenuation by passive stiffness switching mounts.' Journal of sound and vibration 138.1 (1990): 47-57. 37. Laun, H. M., R. Bung, and F. Schmidt. 'Rheology of extremely shear thickening polymer dispersionsa)(passively viscosity switching fluids).' Journal of rheology 35.6 (1991): 999-1034. 38. Fischer, C., Bennani, A., Michaud, V., Jacquelin, E., Månson, J. A. E. 'Structural damping of model sandwich structures using tailored shear thickening fluid compositions.' Smart Materials and Structures 19.3 (2010): 035017. 39. Zhang, X. Z., W. H. Li, and X. L. Gong. 'The rheology of shear thickening fluid (STF) and the dynamic performance of an STF-filled damper.' Smart Materials and Structures 17.3 (2008): 035027. 40. Lee, Young Sil, and Norman J. Wagner. 'Dynamic properties of shear thickening colloidal suspensions.' Rheologica Acta 42.3 (2003): 199-208. 41. Egres Jr, R. G., Lee, Y. S., Kirkwood, J. E., Kirkwood, K. M., Wetzel, E. D., Wagner, N. J. 'Liquid armor: protective fabrics utilizing shear thickening fluids.' Proceeding of Industrial Fabrics Associational International Conference on Safety and Protective Fabrics. Pittsburgh. 2004. 42. TA Instrument. 'Rheometers.' Manual of TA Instrument, 2005. 43. TA Instrument. http://www.tainstruments.com/ 44. Galindo-Rosales, F. J., F. J. Rubio-Hernández, and A. Sevilla. 'An apparent viscosity function for shear thickening fluids.' Journal of Non-Newtonian Fluid Mechanics 166.5 (2011): 321-325. 45. Cauchy, Augustin. 'Méthode générale pour la résolution des systemes d’équations simultanées.' Comp. Rend. Sci. Paris 25.1847 (1847): 536-538. 46. Meza, Juan C. 'Steepest descent.' Wiley Interdisciplinary Reviews: Computational Statistics 2.6 (2010): 719-722. 47. Hartley, Herman O. 'The modified Gauss-Newton method for the fitting of non-linear regression functions by least squares.' Technometrics 3.2 (1961): 269-280. 48. G.K. Batchelor, “An Introduction to Fluid Dynamics”, Cambridge University Press, 1967. 49. K Kundu, Rjucsh, and Ira M Cohen. 'Fluid mechanics', fourth edition, Elsever, 2007. 50. Yang, G., Spencer, B. F., Carlson, J. D., Sain, M. K. 'Large-scale MR fluid dampers: modeling and dynamic performance considerations.' Engineering structures 24.3 (2002): 309-323. 51. Dimock, Glen A., Jin-Hyeong Yoo, and Norman M. Wereley. 'Quasi-steady Bingham biplastic analysis of electrorheological and magnetorheological dampers.' Journal of intelligent material systems and structures 13.9 (2002): 549-559. 52. 國家地震工程研究中心,“國內外現行隔減震元件試驗規範與準則探討”,NCREE-2013-002,2014。 53. 內政部營建署,“建築物耐震設計規範及解說”,2011。 54. American Society of Civil Engineers (ASCE). (2010). ‘Minimum design loads for buildings and other structures,’ ASCE/SEI 7- 10, ASCE, Reston, VA. 55. AASHTO, ‘LRFD Bridge Construction Specifications,’ American Association of State Highway and Transportation Officials, Washington, DC, 2010. 56. ‘EN 15129:2009 - Anti-seismic devices,’ European Committee for Standardization (CEN), November, 2009. 57. ‘A Test Plan for the Characterization and Qualification of Highway Bridge Seismic Isolator and Damping Devices,’ Energy Technology Engineering Center Highway Innovative Technology Evaluation Center California Department of Transportation, 1995. 58. Brown, D. Stephen. 'Bridge strengthening with shock transmission units.' 11th World Conference on Earthquake Engineering. No. 1849. Acapulco, Mexico: Paper, 1996. 59. 財團法人國家實驗研究院國家地震工程研究中心,'台86線24號橋地震災害橋梁修復工程安全評估服務工作成果報告',中華民國交通部公路總局第五區養護工程處, 2016 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/handle/123456789/1300 | - |
dc.description.abstract | 被動型奈米流體阻尼器具有雙指數之力學特性,於小速度下力量與速度呈現 之關係,而於一般運作速度下則呈現 之關係。應用於橋梁,可以降低平時溫差或行車作用下阻尼器之內壓與油封之磨耗,大幅提升阻尼器之耐久性;應用於隔震結構,可以使隔震系統於小地震下充分發揮隔震效果,並且不影響大地震下的消能行為。奈米流體阻尼器物理機構簡單,相較於傳統液態黏性阻尼器製作成本低廉,且可以因應結構設計需求直接進行製造,而非市面上必須配合傳統黏性阻尼器產品型號進行結構設計,因此更一步地提高了結構控制之精度。同時奈米流體阻尼器不須透過內部加壓的方式進行力學行為調整,因此於常時靜止裝態下,不會有額外力量作用於阻尼器油封,可大幅提升油封壽命。另一方面,奈米流體阻尼器安裝於結構物上時,可以直接更換內部奈米流體,以達到即時改變阻尼器的力學行為之目的。奈米流體阻尼器之研發共可分為三大部分:第一為奈米流體流變特性之研究,其中包含奈米流體的配製、以及流體流變特性之試驗,並且透過演算法將奈米流體的黏度曲線,回歸成三組Cross Model組合之數學模型,進一部透過參數分析建立公式化的奈米流體流變資料庫。第二部分為奈米流體阻尼器力學公式之推導與驗證,該公式自流體力學理論出發,將奈米流體的流變行為,導入具有簡單環形間隙之阻尼器構造中,推導出詳解以及誤差極小之簡化公式。同時,藉由實尺寸奈米流體阻尼器之性能試驗,推測理論公式可能的誤差來源,並且進一步透過辦經驗之方式修正材料特性,以擬合試驗結果。最後,第三部分則探討奈米流體尼器之工程特性,藉由參數研究進一步了解各阻尼器物理機構對於其力學行為之影響;最後參考歐盟規範,驗證奈米流體阻尼器符合其消能元件中STU之性能規定,並且透過實際橋梁試驗之量測資料,驗證阻尼器於橋梁車行振動下,相較於傳統黏性阻尼器,具備有極低出力以及累積阻尼能。 | zh_TW |
dc.description.abstract | This Study aims to perform a methodology study and design method for nanofluid dampers. The development of nanofluid dampers comprises three parts, such as material properties, damper behaviors, and engineering applications, in brief. In the first part, 90 nanofluid samples are fabricated with various combinations of different types of fumed silica particles, PPGs, and fluid concentrations. The viscous curves and fluid curves of nanofluids are obtained from rheology tests and also simulated by a triple-Cross model with eleven parameters. Through observing from the results, it could be summarized that the initial viscosity and maximum viscosity are proportional to the fluid concentrations and the polymer chain lengths, but the shear rates corresponding to the maximum viscosities are inversely proportional to these two variations; in addition, the shear thickening and shear thinning effects become more obvious when the concentrations of fluid rise
The second part aims to apply the fluid properties into damper devices by means of theoretical derivations and full-scale damper performance tests. First, an exact solution for the force curves of nanofluid dampers is deduced based on the viscous curve of the fluid triple-Cross model and the theory of equilibrium of fluid momentum. However, owing to the complex viscous model of materials and many unknown parameters in the equations of damper force curve, it is time-consuming for obtaining the force curves by iterations, and is not applicable for further observations on the damper properties. Hence, a simplified solution is deduced according to the simplified bi-linear model of stress curve (in logarithm coordinates) as well as the mass conservation theory of fluid mechanics; several comparisons between the exact solution and simplified solution are made, and the results show only slightly difference between such solutions. Nevertheless, the numerical derivations are fail to predict the force behaviors of the full-scale damper performance tests, which are conducted with two identical dampers filled with nanofluids PPG3000-R972-10% and PPG1000-R972-10% respectively. The major reason is supposed to be the measurement errors caused from the rheology test. Therefore, the fluid stress curves of these two types of nanofluids are modified corresponding to the results of performance tests. In the last part, several properties of nanofluid dampers are discovered by transforming the simplified solution into the combination of two continuous curves with typical forms of viscous dampers, ; for example, the exponents of the force equations are directly equal to the exponents of the simplified fluid bi-linear stress curve and independent to the damper dimensions. On the other hand, the critical velocity, which is corresponding to the intersection point of the two force curves, is independent to the length of piston head but could be enlarged by reducing the radius of piston head and increasing the width of annular gap. Furthermore, the same nanofluid dampers, used in the full-scale damper performance tests, are adopted to verify that the nanofluid dampers meet the requirements listed in the European Standard (EN15129) for the shock-transmission units (STU). Through inputting the recorded data from a practical bridge experiment, which is conducted by driving trucks moving at constant velocities, the energy dissipated by nanofluid dampers is merely 2% to 11% of conventional dampers. Although no former study confirms that the accumulative damping energy will directly affect the durability of one damper (or the seal system), the less energy implies that the seal system will receive smaller pressure and wear. | en |
dc.description.provenance | Made available in DSpace on 2021-05-12T09:35:51Z (GMT). No. of bitstreams: 1 ntu-107-D03521002-1.pdf: 26375902 bytes, checksum: 865e57413b49dd80f71f638eb2d24b3b (MD5) Previous issue date: 2018 | en |
dc.description.tableofcontents | CONTENTS
ACKNOWLEDGEMENTS i 摘要 iii ABSTRACT v CONTENTS vii CHAPTER 1 INTRODUCTION 1 1.1 Background 1 1.2 Motivation and Scope 5 CHAPTER 2 RHEOLOGY THEORIES AND MATERIAL PROPERTIES 12 2.1 Basic rheology theories 12 2.1.1 Viscosity 12 2.1.2 Fluid Classification 14 2.1.3 Fluid steady-state behaviors 16 2.1.4 Fluid viscosity and flow curve models 18 2.2 Materials and nanofluids 21 2.2.1 Polypropylene Glycol, PPG 21 2.2.2 Fumed Silica 22 2.2.3 Nanofluids: The Combinations of Fumed Silica and Polypropylene Glycol 23 CHAPTER 3 NANOFLUID RHEOLOGICAL DATABASE 26 3.1 Nanofluid Fabrication Process 26 3.2 Rheology testing 28 3.2.1 Theory of rheometers 28 3.2.2 Rheology testing 30 3.3 Numerical predictions and parametric study 34 3.3.1 Numerical models 34 3.3.2 Methods for curve fitting 36 3.3.3 Curve fitting results and parametric Study 39 3.3.4 Rheology data base 41 3.4 Summary 42 CHAPTER 4 NANOFLUID DAMPER: THEORY AND EXPERIMENTS 45 4.1 Theoretical Derivation 45 4.1.1 Continuity Equation and Momentum Equation of Fluid [48, 49] 45 4.1.2 Exact Solution to Damper Force Curve 50 4.1.3 Simplified Solution to Damper Force Curve 54 4.2 Full-scale damper Performance Test 58 4.2.1 Full Scale Nanofluid Damper Design 58 4.2.2 Experiment Setup 58 4.2.3 Testing results 60 4.3 Modification of Fluid Rheology Properties 64 CHAPTER 5 DESIGN AND APPLICATIONS 67 5.1 Design Concepts for Nanofluid Dampers 67 5.2 Applications on Bridges 72 5.2.1 Applications as bridge lock-up devices 72 5.2.2 Applications as bridge dampers with long durability 73 CHAPTER 6 SUMMARY 75 6.1 Summary 75 6.2 Future Study 79 TABLES 81 FIGURES 118 REFERENCE 254 | |
dc.language.iso | en | |
dc.title | 應用奈米材料之多功能阻尼器研發 | zh_TW |
dc.title | The Development of Nanomaterial Based Multi-parameter Viscous Damper | en |
dc.type | Thesis | |
dc.date.schoolyear | 106-1 | |
dc.description.degree | 博士 | |
dc.contributor.oralexamcommittee | 蔡克銓(Keh-Chyuan Tsai),黃尹男(Yin-Nan Huang),歐昱辰(Yu-Chen Ou),黃震興(Jenn-Shin Hwang),蔡孟豪(Meng-Hao Tsai) | |
dc.subject.keyword | 奈米材料,流變學,阻尼器性能試驗,阻尼器設計,結構被動控制, | zh_TW |
dc.subject.keyword | Nano-material,Rheology,damper performance test,damper design,structural passive control, | en |
dc.relation.page | 258 | |
dc.identifier.doi | 10.6342/NTU201800310 | |
dc.rights.note | 同意授權(全球公開) | |
dc.date.accepted | 2018-02-06 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 土木工程學研究所 | zh_TW |
顯示於系所單位: | 土木工程學系 |
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