Performance of Multiple Mass Dampers under Random Loading

Effect of tuned mass damper on the interaction of a quarter car model with a damaged bridge

“…Park and Reed (2000) have found uniformly distributed TMDs to perform better than linearly distributed ones. Yamaguchi and Harnpornchai (1993), Abe and Fujino (1994), Kareem and Kline (1995) and Wang et al (2003) have discussed the advantages of multiple TMDs over single TMD. Kwon et al (1998) and Jo et al (2001) have considered the interaction of high-speed vehicles with three span steel box girder bridges and have advocated the use of critical damping value in TMD suggested by Tsai (1993) to avoid the beating phenomenon due to inadequate damper tuning.…”

Control of flapwise vibrations in wind turbine blades using semi-active tuned mass dampers

“…Since a couple of harmonic terms arose in the loading it was simplified to just the first harmonic so the performance of the STMDs could be assessed for this simpler load case. Equation 15 shows the expression for the loading on blade 1. The loads on blades 2 and 3 are shifted by angles of 2π/3 and 4π/3 respectively.…”

“…One of the first buildings to have a TMD installed was the John Hancock Building in Boston. Extensive research has been carried out into the use of passive TMDs and their suitability for vibration control (12,13,14,15). The non-linearity of nearly all engineering dynamical systems has raised the need for Semi-Active TMDs (STMDs) due to their ability to adjust their tuning to cater for changes in the behaviour of the primary system.…”

Semi-active frequency tracking algorithm for control of flapwise vibrations in wind turbine blades

“…Passive TMDs have been used widely throughout civil engineering applications, particularly in tall buildings subjected to wind or earthquake loadings. Over the last few decades extensive research has been carried out into the use of passive TMDs and their suitability for vibration control (6,7). However, due to the non-linearity of nearly all engineering dynamical systems research has more recently focused on Semi-Active TMDs (STMDs) due to their 'active' capabilities without the need for an external power supply.…”