Vibration mitigation and isolation of the lattice sandwich structures based on the metamaterial concepts
-
- Englisch ausgewählt
49,80 €
inkl. gesetzl. MwSt.,
Beschreibung
Produktdetails
Einband
Taschenbuch
Erscheinungsdatum
12.07.2022
Abbildungen
mit 82 Farbabbildungen
Verlag
Shaker MediaSeitenzahl
201
Maße (L/B/H)
1,2/16,6/21 cm
Gewicht
302 g
Auflage
1. Auflage
Sprache
Englisch
ISBN
978-3-8440-8673-7
As passive methods, chessboard-design, gradient design and local resonance mechanism are proposed. The chessboard-design and gradient design techniques break the spatial symmetry of the lattice sandwich structures, which is beneficial to achieve wide band-gaps, vibration or flexural wave trapping and unidirectional flexural wave propagation.
The proposed active methods are based on the utilization of the piezoelectric or electromechanical coupling effect. Shunted piezoelectric Lead Zirconate Titanate (PZT) patches are attached to an elastic base or host structure, which act as sensors and actuators. Then, the active feedback control scheme is incorporated to tune the vibration mitigation and isolation properties of the lattice sandwich structures. To enhance the tuning effects of the active feedback control scheme, two adaptive active feedback control strategies are developed. In the first adaptive control strategy, simple frequency-dependent control gains are estimated and implemented, which can broaden the band gaps of the pyramid-core lattice sandwich structures. The second adaptive control strategy is realized by combing an optimization algorithm (such as the particle swarm optimization or the differential evolution optimization algorithm) to automatically select the best control gains and the active feedback control. Numerical examples demonstrate that the second adaptive control strategy has several essential advantages, for instance, band gap widening, attenuation enhancement, elimination of the resonance peaks inside and outside of the band gaps, merging of different band gaps, and self-adaptivity to external stimulations without human intervention.
At last, two hybrid methods combining the passive and active methods are proposed. The present comprehensive results show that the passive and active methods as well as their hybrid forms proposed in this thesis can efficiently and feasibly enhance the vibration mitigation and isolation performance of the lattice sandwich structures, while keeping their high stiffness-to-density ratio and other essential advantages.
Noch keine Bewertungen vorhanden
Verfassen Sie die erste Bewertung zu diesem Artikel
Helfen Sie anderen Kundinnen und Kunden durch Ihre Meinung.
Kurze Frage zu unserer Seite
Vielen Dank für Ihr Feedback
Wir nutzen Ihr Feedback, um unsere Produktseiten zu verbessern. Bitte haben Sie Verständnis, dass wir Ihnen keine Rückmeldung geben können. Falls Sie Kontakt mit uns aufnehmen möchten, können Sie sich aber gerne an unseren Kund*innenservice wenden.
zum Kundenservice