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研究生:郭總傑
研究生(外文):Tsung-Chieh Kuo
論文名稱:可調式流體阻尼器之分析與實驗
論文名稱(外文):Analyzing and Experimenting with an Adaptive Fluid Damper
指導教授:洪士林洪士林引用關係
指導教授(外文):Shih-Lin Hung
學位類別:碩士
校院名稱:國立交通大學
系所名稱:土木工程系
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:2001
畢業學年度:89
語文別:英文
論文頁數:70
中文關鍵詞:可調式流體阻尼器
外文關鍵詞:adaptivedamper
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在機械工程領域上,流體阻尼器是種使用相當廣泛的控制系統,因此近幾十年來,土木工程師們便試著應用它做為消能減震裝置以減輕結構物在地震時的反應,而流體阻尼器的特點就是當結構物處於強烈的震動時擁有非常優秀的消能性。
本研究乃提出一可調式的流體阻尼器,藉之改變結構物阻尼值,進而達到控制結構物動態行為的目的。本流體阻尼器的主要構想便是活塞孔的設計,流體阻尼器在不同的開孔面積與頻率的情況下我們將可經由實驗獲得不一樣的遲滯迴圈,實驗中我們並以一個數學模型來分析模擬流體阻尼器的動態行為,由分析結果可知流體阻尼器在實驗的往覆來回運動中具有相當良好的消能性。本研究裡我們並以最小平方法來求取阻尼係數與勁度係數。而且由實驗結果顯示,阻尼器可以增加結構物在地震時的消能能力。
關鍵詞:可調式、流體阻尼器
The fluid damper is a promising control system wildly used in mechanical engineering. In the last decade, civil engineers adopt the fluid damper as a dissipator to decrease seismic responses of structures. The characteristic of its energy dissipation is excellent in buildings under greatly excitation.
This study investigates a fluid damper, which is capable of varying the damping coefficient in a structural control system to modify structural vibration. Orifice’s design was the major originality in the tested fluid damper. All sorts of orifices and frequencies were capable of expecting different loops. Mathematical model of the fluid damper is evaluated to develop for analyzing its dynamic behavior, and analytical results demonstrate the effectiveness of the proposed fluid damper under experimental vibration. In this research, the damping coefficient and stiffness coefficient are derived using the least square method. Experimental results indicate that the fluid damper can enhance the energy absorption capability of a structure during an earthquake.
CHAPTER 1 INTRODUCTION
1.1.Introduction----------------------------------------1
1.2.Research Objectives---------------------------------2
1.3.Thesis Organization---------------------------------3
CHAPTER 2 THE STUCTURAL CONTROL SYSTEM
2.1.Introduction----------------------------------------4
2.2.Active Control System-------------------------------5
2.3.Passive Control System------------------------------7
2.4.Semi-active Control System--------------------------9
CHAPTER 3 FLUID DAMPER
3.1.Introduction----------------------------------------12
3.2.Using Scope-----------------------------------------13
3.3.Construction of Damper’s Detail--------------------16
CHAPTER 4 MECHANICAL PROPERTIES OF THE FLUID DAMPER
4.1.Introduction of Experimental Device-----------------21
4.1.1.Actuator--------------------------------------------21
4.1.2.LVDT------------------------------------------------21
4.1.3.Load Cell-------------------------------------------21
4.1.4.Data Acquisition System-----------------------------21
4.2.Experimental Setup----------------------------------24
4.3.Determination of Mechanical Properties of Dampers---31
4.4.Mathematical Modeling of the Fluid Damper-----------32
4.5.Test Results----------------------------------------36
4.6.Least Square Method---------------------------------51
4.7.Analysis and Comparison-----------------------------54
CHAPTER 5 CONCLUSIONS AND RECOMMENDATIONS
5.1.Conclusions-----------------------------------------59
5.2.Recommendations for Future Work---------------------60
LIST OF REFERENCES
Appendix. Application of Fluid Dampers-----------------------63
[1] 徐德俢、李永峰,「結構液流阻尼器之設計及應用」,結構工程, 第13卷第2期,民國87年3月。
[2] 李永峰,「結構液流阻尼器之設計及應用」,國立成功大學土木工程研究所碩士論文( 1997 )。
[3] Michael D. Symans, and Michael C. Constantinou, “Experimental study of seismic response of buildings with supplemental fluid dampers,” the structural design of tall buildings, vol.2, 93-132(1993).
[4] W.N. Patten, R.L. Sack, W. Yen, C. Mo, H.C. Wu, “Seismic motion control using semi-active hydraulic force actuators,” Proceedings of ATC-17-1 Seminar on Seismic Isolation, Passive Energy Dissipation, and Active Control, San Francisco, CA, 727–36 (1993).
[5] “Special issue: structural control; past, present, and future,” journal of engineering mechanics, vol.123 SEPTEMBER (1997).
[6] T.T. Soong, M.C. Constantinou, Passive and Active Structural Vibration Control in Civil Engineering, Springer, New York, (1994).
[7] Michael D. Symans, and Michael C. Constantinou, “Experimental Testing and Analytical Modeling of Semi Active Fluid Dampers for Seismic Protection,” journal of intelligent material systems and structures, vol.8-august, 644-657 (1997).
[8] Douglas P. Taylor, “Fluid Dampers for Application of Seismic Energy Dissipation and Seismic Isolation,” Eleventh World Conference on Earthquake Engineering, No.798, (1996).
[9] B.C. Hansen, F. Gordaninejad, M. Saiidi, F. Chang, “Control of bridges using magnetorheological fluid dampers,” Proceedings of International Workshop on Health Monitoring, Stanford University, Palo Alto, (1997).
[10] 高清雲,「類神經網路在結構主動控制上之應用」,國立交通大學土木工程研究所碩士論文( 1996 )。
[11] 李金進,「類神經網路在脈衝式結構主動控制之應用」,國立交通大學土木工程研究所碩士論文( 1997 )。
[12] Michael D. Symans, and Steven W. Kelly “Fuzzy logic control of bridge structures using intelligent semi-active seismic isolation systems,” Earthquake engineering and structural engineering, vol.28, 37-60 (1999).
[13] Narito Kurata, Takuji Kobori, Motoichi Takahashi, Naoki Niwa and Hiroshi Midorikawa “Actual seismic response controlled building with semi-active damper system,” Earthquake engineering and structural engineering, vol. 28, 1427-1447 (1999).
[14] Michael D. Symans, and Michael C. Constantinou “Semi-active control systems for seismic protection of structures: a state-of-the-art review” Engineering Structures, vol 21: 469-487 (1999).
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