Mass dampers for damping vibrations of structures, structures having such mass dampers, and methods of adjusting the natural frequency of the mass dampers

摘要

The present invention relates to a mass damper (1) using a pendulum mass (3) and damping means (4) to reduce vibration of a structure (2), the mass damper (1) having at least three bearings (5) and , by means of which the pendulum mass 3 is movably supported on the structure 2 to effect a pendulum motion, each bearing 5 having at least one pendulum plate 6 having a concave bearing surface 7 . ) and a convex opposite surface 9 and a sliding shoe 8 movably arranged thereon. According to the invention, the bearing surface 7 and its associated opposing surface 9 are curved with a constant curvature R, and all bearings 5 have the smallest possible frictional force between the opposing surface 9 and the bearing surface 7 . . The invention also extends to a method for adjusting the natural frequency of a mass damper (1) and a structure (2) having such a mass damper, wherein the natural frequency of the pendulum mass (3) displaces the pendulum plate (6) and/ They can be adjusted independently of each other in both major directions by displacing or rotating them. The invention also extends to damping means (4), which can be implemented in the form of linear viscous passive damping, square viscous passive damping or controlled damping, so as to combine this damping with the friction damping of the bearing to optimize the mass damper (1). Tune to attenuate.