Triply coupled analysis method for thin flexible piezoelectric bimorph in fluid
Document typeConference report
Rights accessOpen Access
Piezoelectric–structure–ﬂuidinteractionisacomplexmultiphysicscoupledphenomena appears wherein piezoelectric devices are in contact or surrounded by the ﬂuid media. The piezoelectric energy harvesting using ocean waves, wind ﬂow, and mechanical vibrations are some of the popular energy savaging methods wherein thin piezoelectric bimorphs surrounded by the ﬂuid is used for power harvesting. With recent advances on micro air vehicles actuated by piezoelectric bimorph actuators in the ﬂuid (surrounding media) as attracted the of piezoelectric–structure–ﬂuid interaction. Generally, in these applications, the piezoelectric bimorph is thin, ﬂexible, and surrounded by the ﬂuid. The large deformation of the thin ﬂexible piezoelectric bimorph causes strong interaction with the electric ﬁeld (piezoelectric effect) and the surrounding ﬂuid, and inversely, these two ﬁelds signiﬁcantly affect the structure. The piezoelectric ﬁeld–structure–ﬂuid interaction analysis is very signiﬁcant. In this work, we propose a hierarchal decomposition method to solve piezoelectric–structure–ﬂuid interaction of a piezoelectric bimorph in the ﬂuid. The proposed method is applied to a ﬂexible restrictor ﬂap in converging channel, where the rubber ﬂap is replaced by the piezoelectric bimorphs made of PVDF or PZT–5H. The resonance frequency of the piezoelectric bimorph in the ﬂuid agrees well with the theoretical and numerical pure FSI cases. These results show a good agreement with the previous studies.
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder