Study of Natural Frequencies and Characteristics of Piezoelectric Transformers by Using 3-D Finite Element Method

Vacharakup, Somsak; Peerasaksophol, Monthakarn; Kulworawanichpong, Thanatchai; Pao-la-or, Padej

doi:10.4028/www.scientific.net/amm.110-116.61

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…The second problem is the incapability of the ANSYS modal analysis solver to solve eigenvalue problems described by matrix equations different from (24). This aspect does not allow solving the above-stated natural vibration problem with an external electric circuit.…”

Section: Algorithm For Numerical Solution On the Basis Of The Ansys Pmentioning

confidence: 99%

Algorithm for solving problems related to the natural vibrations of electro-viscoelastic structures with shunt circuits using ANSYS data

Iurlova

Sevodina

Oshmarin

et al. 2018

International Journal of Smart and Nano Materials

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An algorithm for numerical realisation of a mathematical statement of the natural vibrations problem for electro-viscoelastic bodies with passive external electric circuits (i.e. shunting circuits) with an arbitrary configuration using the finite element method is proposed in the present paper. The proposed algorithm allows considering the viscoelastic properties of materials using the model of linear hereditary viscoelasticity with complex dynamic moduli and is used to solve 3D solid structure problems that are compatible for ANSYS package element types. This technique implies the usage of the global assembled matrices of stiffness and mass, formed in the ANSYS package. The basis of the algorithm is a novel approach that allows performing decomposition of the global assembled stiffness matrix formed in the ANSYS software package into constituents that are needed for calculation of the natural vibration frequencies of the objects under study. These matrix components are used in the program that was written in FORTRAN (Formula Translation) language. This problem could be efficiently applied for analysis of the dynamic processes in smart systems based on piezoelectric materials and could also form a basis for the development of numerical finite element algorithms for optimization of the dissipative characteristics of electromechanical systems with shunted piezoelectric elements.

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Section: Algorithm For Numerical Solution On the Basis Of The Ansys Pmentioning

confidence: 99%

Algorithm for solving problems related to the natural vibrations of electro-viscoelastic structures with shunt circuits using ANSYS data

Iurlova

Sevodina

Oshmarin

et al. 2018

International Journal of Smart and Nano Materials

View full text Add to dashboard Cite

show abstract

“…Therefore, it is important to have an understanding of the dynamic characteristics or to determine the resonant frequency when designing a system driven by a smart actuator. The resonant frequency of the smart actuator can be determined by finding out the excitation frequency that creates a maximum actuation displacement [13][14][15] or is predicted by dynamic modeling or finite element analysis (FEA) [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Resonant frequency and hysteresis of a stack actuator made of single crystal (PMN-29PT) layers

Tran

Lee

Kim

et al. 2016

Smart Mater. Struct.

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In this study, we have presented the dynamic behavior of a piezoelectric stack actuator made of forty layers of single-crystal (PMN-29PT) with an area of 10×10 mm 2 and thickness of 1 mm. To conduct a dynamic test of the actuator, we built a test apparatus with dummy weights that was placed over the top of the actuator to measure the actuation displacement. The resonant frequencies of the actuator with and without the dummy weight were determined as the excitation frequencies where a significant increase in the actuation displacement could be observed. We also proposed an analytical multi-degree-of-freedom (MDOF) model of the actuator to analytically predict the resonant frequency. Finite element analyses were conducted to validate the analytically predicted and measured resonant frequencies. With no dummy weight, the resonant frequency of the actuator was measured at 730.00 Hz, which was 0.70% higher than the one calculated by the MDOF model and 0.10% smaller than that of the finite element model. With a dummy weight, the measured resonant frequency was lower than 730.00 Hz and close enough to those computed by the MDOF model and the finite element model. The hysteresis curves of the actuator at various frequencies indicated that the actuator might incur a small energy loss.

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“…However, these models cannot predict the blocking force of a stack actuator accurately. Finite element analysis (FEA) is another way to predict the blocking force of an actuator [16]. The blocking force estimation in the FEA is based on linear elastic material behavior and a linear strain assumption.…”

Section: Introductionmentioning

confidence: 99%

Blocking force of a piezoelectric stack actuator made of single crystal layers (PMN-29PT)

Tran

Phan

Lee

et al. 2016

Smart Mater. Struct.

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In this study, we fabricated and characterized a stack actuator made of forty layers of 1 mm thick PMN-29PT with a cross-sectional area of 10×10 mm 2 . From the measurement of actuation displacement, we confirmed that the piezoelectric strain constant in the direction of thickness of the material is 2000 pm V −1 , as suggested by the manufacturer. The blocking forces of the actuator are measured to be 230 N, 369 N, and 478 N for 100 V, 200 V, and 300 V, respectively. The measured blocking forces showed large discrepancies from the estimated blocking forces calculated using linear models, especially for a high voltage application. An empirical equation acquired by fitting the measured blocking forces indicates that the blocking force has a nonlinear relationship with the applied voltage. The measured hysteresis showed a slight nonlinear voltage-stroke relationship and small energy loss.

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Study of Natural Frequencies and Characteristics of Piezoelectric Transformers by Using 3-D Finite Element Method

Cited by 8 publications

References 3 publications

Algorithm for solving problems related to the natural vibrations of electro-viscoelastic structures with shunt circuits using ANSYS data

Algorithm for solving problems related to the natural vibrations of electro-viscoelastic structures with shunt circuits using ANSYS data

Resonant frequency and hysteresis of a stack actuator made of single crystal (PMN-29PT) layers

Blocking force of a piezoelectric stack actuator made of single crystal layers (PMN-29PT)

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