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Study on Magnetorheological Damper and It’s Application to Structural Vibration Control

Author: XieWei
Tutor: DongPing
School: Huazhong University of Science and Technology
Course: Structural Engineering
Keywords: Magnetorheological damper Performance Test Mechanical model Parameter Identification Passive control Shaking table test
CLC: TB535.1
Type: Master's thesis
Year: 2007
Downloads: 193
Quote: 3
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Abstract


Structural vibration control is a new seismic technology, the magnetorheological damper structural damping control is one effective method. The magnetorheological damper not only has the advantages of simple structure, small size, fast response, low energy consumption and continuous good times or bad adjustable damping force, but also easy and computer combined. At home and abroad has been more and more scholars into this aspect, and has yielded some results, but there are still some problems in the mechanical model of magnetorheological damper and magnetorheological damping structure analysis, to be further perfect and resolve. Damping control the magnetorheological damping characteristics of the damper and magnetorheological damping structure, a more detailed study, the completion of the following aspects of the research work: Experimental study of magnetorheological damper, the results show that of magnetorheological damper displacement - damping force curve nonlinear hysteretic behavior, hysteresis loop plump magnetorheological damper energy consumption and better performance. The test results display the magnetorheological damper piston velocity output damping force of the relationship between the performance of the S-shaped curve, before yielding significant performance in the low-speed region, the speed of the magneto-rheological dampers - force relationship nonlinear hysteretic characteristics, in the high speed zone, the speed - the damping force relationship can be approximated as linear. Finally, based on test results magnetorheological damper mechanical model, the use of test results to identify the unknown parameters in the model parameters to change the relationship with the current and excitation frequency mechanical model. Magnetorheological damper passive control law control the seismic response of building structures, mechanical analysis and calculation model. Through the example of magnetorheological damper control law passive control of the seismic response of building structures, tested by time history analysis of seismic response control effect of magnetorheological damper seismic responses of structures, analyze the impact of structural passive control effect factors. Shaking table test, the results showed that: when magnetorheological damper can be very close to the natural frequency of external excitation frequency and structure through the four-story steel frame structure installed magnetorheological damper on an underlying control The dynamic response of the structure, the damping effect of about 80%. The comparison shows that the results of the test results and numerical analysis, test results and the results of numerical analysis are basically consistent, which also verified the reliability of the numerical analysis.

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CLC: > Industrial Technology > General industrial technology > Acoustic engineering > Vibration, noise and its control > Vibration and noise control and its use > Vibration isolation, damping materials and structures
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