Frequency-adaptive leaf-spring tuned mass damper

A one- or two-dimensionally effective tuned mass damper for a vibration system, which can be adapted to disturbance frequencies, comprising a machine, a vehicle, or an installation, which is exposed to said disturbance frequencies to be damped, essentially comprising

• (i) a damper mass,
• (ii) at least one leaf-spring assembly capable of vibrating in case of force flows, which assembly is firmly connected directly or indirectly to a support unit of said machine or installation and directly or indirectly to the damper mass and has a predetermined stiffness, and
• (iii) a device for changing the predetermined stiffness of the leaf-spring assembly and thus for adjusting the frequency of the vibration system to the disturbance frequencies, the device being connected both to the leaf-spring assembly as well as to the support device of the vibration system,
• wherein
• (iv) the at least one leaf-spring assembly has one or more leaf-springs stacked in parallel, which are pre-bent about their transverse axis in a force-free state, the longitudinal axis of the leaf-springs or the leaf-spring assembly being defined by the direction of the force applied during operation,
• (v) the two end or clamping regions of the individual leaf-springs or the leaf-spring assembly are deflected or offset relative to one another by a defined, preset amount with respect to their position in relation to the longitudinal axis, said predetermined deflection corresponding to a specific stiffness of the leaf-spring assembly and thus to a specific frequency of the vibration system connected to the leaf-spring assembly, and
• (vi) the device comprises a displacement device, a rotary device, a piezo element, or a bimetallic element, the device or element being designed and arranged such that it allows a reversible bending of the pre-bent leaf-spring assembly in the direction perpendicular to the longitudinal axis, and thus, depending on the direction of displacement or rotation by the device, an increase or decrease in the preset deflection of the pre-bent leaf-spring assembly is achieved, whereby the predetermined stiffness of the leaf-spring assembly can be changed along its longitudinal axis and the frequency of the vibration system can thus be adapted to a changed disturbance frequency.