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Structural Engineering and Mechanics
  Volume 3, Number 5, September 1995, pages 497-509
DOI: http://dx.doi.org/10.12989/sem.1995.3.5.497
 


DYNAMIC CHARACTERISTICS OF STRUCTURES WITH MULTIPLE TUNED MASS DAMPERS
JANGID RS

 
Abstract
    Effectiveness of multiple tuned mass dampers (MTMD) in suppressing the dynamic response of base excited structure for first mode vibration is investigated. The effectiveness of the MTMD is expressed by the ratio of the root mean square (RMS) displacement of the structure with MTMD to corresponding displacement without MTMD. The frequency content of base excitation is modelled as a broad-band stationary random process. The MTMD\'s with uniformly distributed natural frequencies are considered for this purpose. A parametric study is conducted to investigate the fundamental characteristics of the MTMD\'s and the effect of important parameters on the effectiveness of the MTMD\'s. The parameters include: the fundamental characteristics of the MTMD system such as damping, mass ratio, total number of MTMD, tuning frequency ratio, frequency spacing of the dampers and frequency content of the base excitation. It has been shown that MTMD can be more effective and more robust than a single TMD with equal mass and damping ratio.
 
Key Words
    EFFECTIVENESS, MTMD, VIBRATION CONTROL, STOCHASTIC RESPONSE AND SYSTEM PARAMETERS
 
Address
JANGID RS, INDIAN INST TECHNOL,DEPT CIVIL ENGN,BOMBAY 400076,MAHARASHTRA,INDIA
 

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