Performance of a New Fine Particle Impact Damper

Abstract

The energy dissipation mechanisms of conventional impact damper (CID) are mainly momentum exchange and friction. During the impact process, a lot of vibration energy cannot be exhausted but reverberated among the vibration partners. Besides, the CID may produce the additional vibration to the system or even amplify the response in the low-frequency vibration. To overcome these shortcomings, this paper proposes a new fine particle impact damper (FPID) which for the first time introduces the fine particle plastic deformation as an irreversible energy sink. Then, the experiments of the cantilevered beam with the CID and that with the FPID are, respectively, carried out to investigate the behavior of FPID. The experimental results indicate that the FPID has a better performance in vibration damping than in the CID and the FPID works well in control of the vibration with frequency lower than 50 Hz, which is absent to the non-obstructive particle damper. Thus, the FPID has a bright and significant application future because most of the mechanical vibration falls in the range of low freqency.

Modeling the fine particle impact damper

“…Du et al [38] found that the particles, when clamped by normal impact of two large bodies, can absorb a large amount of kinetic energy. Structures or devices equipped with the FPID could have good performance in vibration environment, which has been verified by experiments [36].…”

“…Experimental details can be found in [36]. The cantilever beam made of steel is 315 mm in length, 45 mm in width, and 2.1 mm in thickness.…”

“…The two curves are very close. In about only 2 s the displacement is suppressed already to a very limited level, to which systems with conventional PID need more than 6 s to approach [36].…”

“…Du et al [36] proposed a new fine particle impact damper (FPID) which introduces plastic deformation of fine particles to vibration system as perpetual energy dissipation. In FPID, a small quantity of fine particles is enrolled as damping agent.…”

Vibration Antiresonance Design for a Spacecraft Multifunctional Structure

“…In addition, some structural vibration control technologies such as particle damper, impact damper, particle tuned mass damper, and viscoelastic damper [7][8][9][10] are used in the aerospace field at present. A reaction wheel isolator assembly [11] made up of a set of six machined spring elements with bonded viscoelastic material was designed to reduce microvibration transmitted to the optical payload of Chandra Observatory.…”