Abstract
The presented paper reveals an innovative device which is the Tuned Particle Impact Damper (TPID). The damper enables the user change the dynamical features of the vibrating system thanks to rapidly tuning the volume of the container where the grains are locked. The effectiveness of proposed semi-active damping methodology was confirmed in experiments on vibrations of a cantilever beam excited by kinematic rule. Various damping characteristics captured for different volumes of the grains container and mass of granular material are presented. It is confirmed that the proposed TPID device allowed for efficient attenuation of the beam’s vibration amplitude in the range of its resonant frequency vibrations.
Highlights
Devices that are able to attenuate unwanted mechanical vibrations have interested researches and engineers for several decades
The most popular passive shock absorbers constructions consist of viscous properties of elastomers or more or less sophisticated fluids or gels. It seems that so called Particles Impact Dampers (PID) start to play an increasingly important role in the field of vibrations damping
The present paper focuses on the revealing the extraordinary features of the Tuned Particle Impact Damper (TPID) device prototype, where rapid changes of the volume container allow for adjusting the damping characteristics of the system aimed in reducing the effects of temporary external excitations
Summary
Devices that are able to attenuate unwanted mechanical vibrations have interested researches and engineers for several decades. The PID device connected to the vibrating element or structure absorbs a part of global kinetic energy of the investigated system and reduces its vibrations amplitudes The effectiveness of such a damping strategy mainly results from coupling of friction and impact phenomenon. The typical example of such an environment is aerospace engineering, where PIDs are especially popular It is presented in Reference [17] that attenuation of vibrations of highly sensitive electric circuits can be achieved by PIDs. Application of granular damping seems to be optimal solution in the case of taking-off or landing of spacecrafts. Based on the recent results it possible to determine the effectiveness of the TPID damper to attenuate vibrations depending on the application of various grains material, variable mass of particles and container volume and the excitation frequency. The paper is completed with a Conclusion Section where the summary and the perspective research are revealed
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