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1
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Modeling of a Circular Plate with Piezoelectric Actuators of Arbitrary Shape

100%
Wiciak M., Trojanowski R.
Acta Physica Polonica A
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2013
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vol. 123
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issue 6
1048-1053
EN
This paper is concerned with mathematical aspects and numerical modeling of vibration of a circular plate with piezoelectric actuators. Particularly, a thin Kirchhoff-Love plate with arbitrary shaped actuators (e.g. pie-shaped, trapezoid, disc, and rectangular) is considered. In the theoretical model, the moments that act upon a structure and are induced by piezoelectric actuators are described by the generalized tensor product of a distribution and distribution-valued function. Numerical computations utilize the FEM approach supported by Ansys software.
2
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Structural Noise Reduction and Its Effects on Plate Vibrations

100%
Trojanowski R., Wiciak J.
Acta Physica Polonica A
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2012
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vol. 121
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issue 1A
A-148-A-151
EN
The aim of this work is reduction of structural noise generated by plate and its impact on plates vibrations. For this purpose a one-side clamped aluminum plate with 5 piezo elements attached is used. One of the elements is used for plate excitation, two as vibration sensors, and two as actuators. Structural noise is measured by a microphone connected with SVAN 912 E. Study was divided into three parts: measurements of vibrations and noise generated by excited plate, active vibration control, and structural noise reduction. A significant noise local noise reduction is obtained, although with increase in plate vibrations.
3
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Comparison of Efficiency of Different Shapes of Homogeneous and Two-Part Piezo Elements on Vibration Reduction

100%
Trojanowski R., Wiciak J.
Acta Physica Polonica A
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2012
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vol. 122
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issue 5
905-907
EN
The subject of this work is a numerical analysis of efficiency of different piezo element shapes and types used for vibration (and later structural sound) reduction. The shapes of both types of piezo elements used are as follows: square, right-angled triangle, and parallelogram. There are 2 types of piezo elements used in this study: homogeneous elements and elements consisting of 2 parts (inner and outer) of different composition. These are attached to steel plate clamped on all sides. For every simulation 5 elements are used as actuators, with 1 as disturbance source, and other 4 as active dampers. On the other side of a plate 4 elements are placed acting as vibration sensors. The actuator used as a disturbance source as well as sensors are always in the shape of a square. 4 modes were taken into account (analyzed each one singular and all together). Analyses were made with the use of ANSYS software.
4
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Numerical Analysis of the Effectiveness of Two-part Piezoactuators in Vibration Reduction of Plates

100%
Wiciak M., Trojanowski R.
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vol. 125
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issue 4A
A-183-A-189
EN
This paper is concerned with application of piezoelements with a step change of material properties occurring in the element's plane. Each part of an element may be controlled independently. Analytical models for different shape and location of the inner part of a two-part piezoactuator are developed. Finally, results of numerical simulations concerning effectiveness in vibration reduction of piezoactuators constructed this way are presented.
5
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The Effect of Material Composition of Piezoelectric Elements with Chosen Shapes on Plate Vibration Reduction

100%
Wiciak J., Trojanowski R.
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vol. 125
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issue 4A
A-179-A-182
EN
This paper presents numerical analysis of efficiency of different shapes and material composition of piezoelectric actuators used for vibration reduction. Four numerical models representing a plate clamped on all sides with two attached piezoelectric elements were created. For each model, one element had the same shape and composition and was used for plate excitation, and the other one, used for vibration reduction, had different shape and possibly material composition and could be of square or circular shape with either homogeneous or two-part material composition. Two modes were taken into account: the first mode and the fifth mode. Analysis of results was performed with ANSYS software.
6
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Comparison of Vibration and Acoustic Pressure Reduction Using Different Types of Piezo actuators

100%
Wiciak J., Trojanowski R.
Acta Physica Polonica A
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2015
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vol. 128
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issue 1A
A-62-A-66
EN
This paper presents results of numerical simulations on reduction of sound pressure radiated from a square plate using different types of piezo actuators. For this purpose a FEM model was developed using ANSYS software with said steel plate with a hemisphere of air on one side of the plate. There are two criteria by which the reduction is measured: minimising vibrations of plate area and minimising sound pressure on a half sphere surrounding the plate. Changes in the results for both the radiated sound pressure and plate vibration are discussed.
7
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Preliminary Results of Laboratory Tested System for Active Control of Plates VIA LabVIEW and Piezoelectric Elements

100%
Trojanowski R., Wiciak J.
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issue 1
168-173
EN
The design and implementation of a labview and PID controller developed for the damping of sinusoidally excited forced vibrations of a plate is presented. The plate used in the study is clamped at one side and free at the others aluminum plate with five piezo elements attached. Two of them act as sensors, and three as actuators (one for vibration source, and two for active vibration control). Selected experimental results are used to demonstrate the effectiveness of the proposed platform.
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