Semiactive Tuned Mass Damper for Floor Vibration Control

A semiactive magnetorheological device is used in a pendulum tuned mass damper (PTMD) system to control the excessive vibrations of building floors. This device is called semiactive pendulum tuned mass damper (SAPTMD). Analytical and experimental studies are conducted to compare the performance of the SAPTMD with its equivalent passive counterpart. An equivalent single degree of freedom model for the SAPTMD is developed to derive the equations of motion of the coupled SAPTMD-floor system. A numerical integration technique is used to compute the floor dynamic response, and the optimal design parameters of the SAPTMD are found using an optimization algorithm. Effects of off-tuning due to the variations of the floor mass on the performance of the PTMD and SAPTMD are studied both analytically and experimentally. From this study it can be concluded that for the control laws considered here an optimum SAPTMD performs similarly to its equivalent PTMD, however, it is superior to the PTMD when the floor is subjected to off-tuning due to floor mass variations from sources other than human presence. It is also found that for the case of off-tuning due to floor mass variations from the human occupants when the human-structure dynamic interactions are not considered in the analytical modeling, large inconsistencies between the analytical and experimental results can be expected.

[1]  D. E. Allen,et al.  A simple absorber for walking vibrations , 1984 .

[2]  William H. Press,et al.  Numerical recipes , 1990 .

[3]  John Kenneth Ritchey.  Application of Magneto-Rheological Dampers in Tuned Mass Dampers for Floor Vibration Control , 2003 .

[4]  Hugo Bachmann,et al.  Vibration Problems in Structures: Practical Guidelines , 1994 .

[5]  Thomas M. Murray,et al.  Using Tuned Mass Dampers to Eliminate Annoying Floor Vibrations , 1995 .

[6]  James M. W. Brownjohn,et al.  Modeling and simulation of human-floor system under vertical vibration , 2001, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[7]  Mehdi Setareh,et al.  Tuned Mass Dampers to Control Floor Vibration from Humans , 1992 .

[8]  Kenneth H. Lenzen.  Vibration of Steel Joist-Concrete Slab Floors , 2007 .

[9]  Anthony C. Webster,et al.  Application of Tuned Mass Dampers To Control Vibrations of Composite Floor Systems , 2003 .

[10]  M. Rabins,et al.  Semi‐Active versus Passive or Active Tuned Mass Dampers for Structural Control , 1983 .

[11]  Cheryl E Rottmann.  The use of tuned mass dampers to control annoying floor vibrations , 1996 .

[12]  Jeong-Hoi Koo,et al.  In Search of Suitable Control Methods for Semi-Active Tuned Vibration Absorbers , 2004 .

[13]  Mehdi Setareh,et al.  Pendulum Tuned Mass Dampers for Floor Vibration Control , 2006 .

[14]  Mehdi Setareh,et al.  A study of the application of the pendulum tuned mass dampers in building floor vibration controls , 2004 .

[15]  Michael J. Chrzan,et al.  MR fluid sponge devices and their use in vibration control of washing machines , 2001, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[16]  Mehdi Setareh,et al.  TUNED MASS DAMPERS FOR BALCONY VIBRATION CONTROL , 1992 .

[17]  Hugo Bachmann,et al.  Vibration problems in structures , 1995 .