Excessive vibration of three large balconies in a performing art center were dampened using tuned mass dampers (TMDs). Nine TMDs were designed and built for the three balconies (three/balcony) and appended to the vibrating structure at locations where they can most effectively couple with the target mode(s).
The TMDs, tuned to the balcony resonant frequencies of 6 Hz and 9 Hz, added the required damping to the balconies to bring their vibration to acceptable levels. More
