Description

Tuned Mass Damper (TMD) is a vibration system composed of mass block, elastic element and damping element. When the structure vibrates under external excitation, the TMD is driven to vibrate together, and the inertial force generated by the TMD reacts on the structure. By tuning this inertial force, the TMD can have a tuning effect on the vibration of the main structure, thus achieving the goal of reducing the vibration response of the structure.

It is usually divided into suspended type and horizontal (vertical) type, which are used to control high-rise wind vibration or human- induced vibration of long-span structures and footbridges.

A new eddy-current Tuned Mass Damper (TMD)

In order to solve the disadvantage of using oil damper in TMD, we developed the mass damper of eddy current Tuned Mass Damper (TMD).

The eddy current damping system does not require power supply. Damping is produced by the motion of a purely mechanical permanent magnet relative to a non-magnetic conductor. The basic principle of damping generation is to generate electromagnetic damping by cutting magnetic inductance. Its specific damping energy dissipation principle is: when the non-magnetic conductor cutting lines of magnetic force in magnetic field movement, the conductors can produce corresponding induced electromotive force, and form a spiral of eddy current. At the same time, it will produce a new magnetic field and the original magnetic field in the opposite direction and inhibit the damping force of relative movement between the two, eventually leading to vibration energy by the resistance of the conductor heating be burned off. This is the so-called eddy current damper.

It has the following outstanding advantages： 

All mechanical structure; no damping oil and other similar damping medium; more stable and durable; Fully open structure; the damping system completely connected with atmospheric circulation; good heat dissipation; continuous energy consumption;