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PERFORMANCE OF MULTIPLE TUNED MASS DAMPERS FOR TORSIONALLY COUPLED SYSTEM
Author(s) -
JANGID R. S.,
DATTA T. K.
Publication year - 1997
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/(sici)1096-9845(199703)26:3<307::aid-eqe639>3.0.co;2-8
Subject(s) - tuned mass damper , eccentricity (behavior) , asymmetry , structural engineering , physics , parametric statistics , coupling (piping) , excitation , engineering , damper , mathematics , mechanical engineering , statistics , quantum mechanics , political science , law
Dynamic response behaviour of a simple torsionally coupled system with Multiple‐Tuned Mass dampers (MTMDs) is investigated. The system is subjected to lateral excitation that is modelled as a broad‐band stationary random process. MTMDs with uniformly distributed frequencies are considered for this purpose and they are arranged in a row covering the width of the system. A parametric study is conducted to investigate the effectiveness of MTMDs on reducing the response of torsionally coupled system. The parameters include the eccentricity of the main system, its uncoupled torsional to lateral frequency ratio and the damping of MTMDs. It is shown that the effectiveness of MTMDs in controlling the lateral response of the torsionally coupled system decreases with the increase in the degree of asymmetry. Further, the effectiveness of MTMDs, designed for an asymmetric system by ignoring the effect of the torsional coupling, is overestimated. © 1997 by John Wiley & Sons, Ltd.