Analysis of inertial amplification mechanism with smart spring-damper for attenuation of beam vibrations

Abstract

In this paper an inertial amplification mechanism with an embedded smart spring-damper device for attenuation of longitudinal vibrations in continuous structures is analyzed. The complex systems are the extension of the already investigated inertial mechanism, here additionally equipped with the vacuum controlled spring-damper device which shows features of smart materials. This allows the semi-active control to affect different frequency vibration ranges in the real time. The fea.tures of the basic inertia amplification mechanism are preserved as a possibility to generate two neighbouring anti-resonance frequencies between resonance peaks in the low frequency range.

Isotacticity in chiral phononic crystals for low-frequency bandgap

“…Based on this, a planar orthorhombic chiral lattice based on Thomson scattering was reported recently [60], in which an ultra-broad bandgap was achieved. It's worth noting that, an identical geometric feature can be observed from these studies [35,57,[61][62][63], i.e., these geometries have a distinctive feature of alternating movement orientations between adjacent atoms (described as syndiotacticity [57] for convenience).…”

Design of elastic and dissipation joints in bearing structures of electronic packages

“…Some of known damping techniques [19][20][21][22][23] propose reducing amplitude of vibration by either increasing stiffness of CC or by damping devices. Increasing stiffness in fixtures of CCs inside the case of enclosure or increasing stiffness of CC structure by using stiffeners is characterized by increased mass or volume and by effects, which do not eliminate oscillations of CCs as they follow oscillations of the enclosure and transmit them to electronic components being damaged as engaged in resonance.…”