TMD (Tuned Mass Damper)

A TMD is based on a spring-mass system. The spring is calibrated to the eigenfrequency of the structure and the required mass is designed depending on the modal mass of the structure. Decisions, for example with regard to form, mass, frequency or damping, are made in close collaboration with the specifier.

Comparison of passive and adaptive tuned mass dampers

Passive tuned mass dampers

Adaptive tuned mass dampers

For pendulum TMDs the pendulum lengths, the pendulum supports and damping elements in the passive tuned mass damper are designed using a non-linear dynamic simulation of the structure.

Frequency and damping can be adjusted in real time with the adaptive tuned mass damper. An adaptive TMD produces a60 – 80% reduction in vibrations with75 – 85% of the nominal mass.

The greater the mass ratio µ (damper mass / modal mass), the greater the reduction in vibrations and bandwidth of the tuned mass damper. This also results in lower damper mass amplitude.

MAURER passive tuned mass damper: MTMD-V and MTMD-H

The tuned mass dampers are installed in such a way that the motion of the mass is always in the intended damping direction. Diagonal or oblique displacement is also possible.

Vertical tuned mass dampers

The MTMD-V consists of a mass that allows vertical movement and is guided and supported on steel springs. A damping element is positioned in parallel to the springs. The springs have a frequency adjustment tolerance of approximately 10%.

Slim designs of a TMD, e.g. for use in bridge railings, are also possible.

Horizontal tuned mass dampers

The MTMD-H consists of a mass that vibrates horizontally and is guided and supported between steel springs. A damping element is positioned perpendicular to the springs. The springs have a frequency adjustment tolerance of approximately 10%.