Constrained-layer Damping Applied to DCJ Vibration Isolation Design

Abstract

A dual piezoelectric cooling jet (DCJ) is an innovative cooling device that uses piezoelectric materials to generate high-speed vibrations, thereby causing changes in the flow field to achieve heat exchange. Despite its high cooling efficiency, a DCJ transfers vibrations through its supporting base to its peripheral devices. To attenuate vibrations from DCJs, this study employed constrained-layer damping (CLD)-a technique for suppressing vibrations-to develop a base for cooling devices and to propose a C-DCJ model. ANSYS simulation of the vibrations of a DCJ and the C-DCJ suggested that, under the same vibration conditions and with the same levels of cooling efficiency, the amplitude and acceleration of the base on the C-DCJ were 30%-50% lower than that on the DCJ. Thus, the proposed C-DCJ effectively isolated vibration transfer.

Active vibration control of smart beam under parametric variations

“…It means that each material has different thermal strain values at the same temperature. Thermal expansion of linear material is given as [3].…”

On the Region for the Application of Passive Damping Treatment and Loss Factor Enhancement

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