Experimental study mitigating vibrations using TMD device
Dr. ZhiGang Wu
Department of Engineering Mechanics,
Dalian University of Technology, Dalian 116024, China.
Email: wuzhg@dlut.edu.cn
Background
Tune Mass Damper (TMD) is a kind of device used to mitigate vibrations of civil
engineering structures. The principle of TMD is adding a sub-vibration system to
absorb the kinemics energy of the main structure. The resent project is to investigate
the effect of mitigating vibrations of offshore structure using TMD with laboratory
tests.
The previous studies of evaluating effects of TMD is focused on the parameters of
frequency and damping, only few pay attention on relative movement of TMD and
structure.
An experimental test system has been set up to investigate the further relation
between structure response and TMD response in DUT. The experimental
arrangement, including the design of platform models and the moving table which
simulates the response of real platform. In order to verify the validity of the device
model, the moving table test of the large-scale mass damper was carried out. The
excitation inputs were the first modal response displacement at the roof floor
measured from the field observation.
Students on this project are required to have fundamental knowledge of structural
control theory and be familiar with MATLAB and Simulink The knowledge on using
ANSYS software is preferred.
Tasks
1.
2.
3.
4.
Study basic knowledge of structure vibrations and vibration mitigation..
Study to use the Control System and Signal Processing Toolbox in MATLAB.
Learn to use the dada acquisition system and conduct model test.
Give the attentive results about phase between structure response and TMD
response.
5. Complete a report on the research project.
References
1. T.T. Soong, G.F. Dargush, Passive Energy Dissipation Systems in Structural
Engineering, Buffalo, New York, 1997 [M]. “Chapter 7”.
2. Jerome J. Connor, Introduction to Structural Motion Control, MIT, 1999. [M].
“Chapter 4”.
3. Yue, Q., and Liu L., “Ice Problems in Bohai Sea Oil Exploration.” Proc., 17th
International Conference on Port and Ocean Engineering Under Arctic Conditions,
2003.
4. T.UETA, etc., Suppression of wind-induced vibration by dynamic dampers in
tower-like structures. Journal of Wind Engineering and Industrial
Aerodynamics.41-44. 1992.