Optimal Design for Distributed Multiple Tuned Mass Dampers and the Performance under Excitation
Date Issued
2016
Date
2016
Author(s)
Hong, Yu-Shan
Abstract
In recent year, tuned mass dampers have been widely used to control the vibrations due to wind or earthquake. TMDs are often used in high-rise buildings, long-span bridges and machines of high-tech factory to reduce the vibration and the discomfort. But the performance of single tuned mass damper (STMD) is sensitive to the frequency of TMD, it suffered a deterioration if the TMD parameters shift away from their optimum solution. Furthermore, the performance of system with TMD sometimes becomes worse when the system is affected by earthquakes. Some researchers point out that high modal responses may be excited when the system is suffered by earthquake. So the object of the distributed multiple tuned mass damper (DMTMD) is that not only control the first mode but also the other important modes. It makes the vibration of system can always be controlled no matter what the excitation frequency is. In the thesis, we propose the design method of DMTMD, and respectively, give the STMD and the DMTMD appropriate algorithm. It makes the procedure of optimal analysis faster, more stable and more accurate, and the solutions are global minimum. Using the framework of this thesis, we do the parameter optimization on shear type structures of different story, and use the white-noise and earthquake time histories around the world to examine the performance of DMTMD. In reality, the axial deformation will occur when the structure suffered from earthquake. So we also use moment frame to analysis in order to get a reasonable solution.
Subjects
Tuned Mass Damper
Optimization
Moment Frame
Time History
Type
thesis
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