10.5162/sensor09/v2/c6.1Fabian WeinElias WellerThorsten AlbachAlexander SutorReinhard LerchC6.1 - Topology Optimization of a Piezoelectric Energy HarvesterAMA Service GmbH, P.O. Box 2352, 31506 Wunstorf, Germany2009energy harvesterpiezoelectricitySIMPtopology optimizationvibrationAMA Association for Sensor Technology e.V., Sophie-Charlotten-Str. 15, 14059 Berlin, GermanyengConferencePaper978-3-9810993-5-56 Pages859 KBapplication/pdfWe use a thin piezoelectric layer attached to a mechanical plate to harvest mechanical energy as available at the vibrating skin of machinery. By modifying the material distribution of the piezoelectric layer the resonance frequency of the energy harvester is adjusted to maximize the objective function. In this paper the electric energy and the electric potential is maximized. This topology optimization problem is performed by a variant of the SIMP (Solid Isotropic Material with Penalization) method which determines for every finite element cell if it is better to have piezoelectric material at that location or not. Numerical results are shown for single frequency pressure excitations from a broad frequency range. The objective functions electric potential, electric energy, energy conversion factor and mean transduction are discussed.