| Autor: |
Djabrouhou, Ikram, Mahieddine, Ali, Bentridi, Salaheddine, Kouadria, Khaled Madani, Hemis, Mohamed |
| Předmět: |
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| Zdroj: |
Journal of Vibration Engineering & Technologies; Feb2024, Vol. 12 Issue 2, p2425-2435, 11p |
| Abstrakt: |
Purpose: This work proposes a model for assessing the dynamic behavior of a non-uniform Functionally Graded Piezoelectric Material (FGPM) tapered beam exposed to a harmonic electrical load. The FGPM structure is modeled as a unimorph cantilever beam with the top surface made of piezoelectric material and split into ten sections; each section is considered an independent actuator. Methods: Timoshenko's assumptions and Hamilton's principle are used to derive the dynamic equation of motion based on the finite element method (FEM). The damping effect was taken into account according to the well-known Raleigh formula. Results: First, a validation procedure is performed to check the proposed model's correctness. Then, a parametric analysis is carried out to predict the effect of material and geometrical characteristics on the beam's output on both frequency-domain and time-domain, such as the power law index, taper ratio, and degree polynomial function. A comparison between the vibrational energy for different parameters is investigated. Finally, the effect of piezoelectric patch locations is examined within the time-domain. Conclusions: The findings showed that the resonance frequency decreases as the power law index rises. In addition, it declines when the polynomial degree and taper ratio parameters are raised. Indeed, for the referential case N = 1 (n = 0), the vibrational energy was reduced with a fraction ranging from 7.35% to 22.35%. Meanwhile, increasing taper ratio values implies a reduction from 23.10% ( α = 0.3 ) to 55.68% ( α = 0.5 ). The obtained results show that the investigated factors including the patch location, impact the time-domain analysis considerably. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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