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Numerical modeling of shape and topology optimisation of a piezoelectric cantilever beam in an energy-harvesting sensor

Thein, Chung Ket; Liu, Jing-Sheng



Piezoelectric materials are excellent transducers for converting mechanical energy from the environment for use as electrical energy. The conversion of mechanical energy to electrical energy is a key component in the development of self-powered devices, especially enabling technology for wireless sensor networks. This paper proposes an alternative method for predicting the power output of a bimorph cantilever beam using a finite-element method for both static and dynamic frequency analyses. A novel approach is presented for optimising the cantilever beam, by which the power density is maximised and the structural volume is minimised simultaneously. A two-stage optimisation is performed, i.e., a shape optimisation and then a “topology” hole opening optimisation.

Journal Article Type Article
Publication Date 2017-01
Journal Engineering with computers
Print ISSN 0177-0667
Electronic ISSN 1435-5663
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 33
Issue 1
Pages 137-148
Keywords Piezoelectric; Multi-disciplinary optimisation; Shape and topology optimisation; Energy harvesting; Bimorph cantilever beam
Publisher URL
Additional Information Authors' accepted manuscript of article: Thein, C.K. & Liu, JS. Engineering with Computers (2017) 33: 137. The final publication is available at Springer via


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