Braion Moura - Academia.edu (original) (raw)
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Swiss Federal Institute of Technology (ETH) & University of Zurich
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Papers by Braion Moura
14th WCCM-ECCOMAS Congress, 2021
The study analyzes the dynamic behaviour and vibration attenuation of an Euler Bernoulli beam cou... more The study analyzes the dynamic behaviour and vibration attenuation of an Euler Bernoulli beam coupled with a piezoelectric layer. The vibration attenuation is given by the shunt circuit connected to the piezoelectric. This paper shows different shunt circuit impedances and how they affect the system's frequency response (FRF) functions. The spectral element method is used to model the intelligent material under analysis and has its function based on the exact solution of the wave equation, therefore, a single element is necessary to model the structure. The estimated responses for each shunt configuration express a relationship with the passive components used in the respective circuits. In each case, the circuit has a particular effect on FRFs.
The European Physical Journal Special Topics, 2022
Latin American Journal of Solids and Structures, 2021
Journal of Computational and Nonlinear Dynamics, 2020
The accurate prediction of the dynamic characteristics of a structure is key to successful vibrat... more The accurate prediction of the dynamic characteristics of a structure is key to successful vibration control strategies. A typical vibration and wave propagation control is performed through periodic and shunted piezoelectric patches, also known as a smart material. Therefore, the smart metamaterial considers periodic arrangement of shunted piezoelectric patches providing a beam with attenuation properties which depend on the resonant behaviour of the shunts. The vibration attenuation occurs due to an elastic-electrical system characterized by an internal resonance of the shunt circuit. The spectral element approach provides very accurate solutions for the structural dynamic response. In this paper, a beam-piezoelectric structure is introduced to focus on the control of flexural waves in beams with piezo-layers connected to single and multi resonant shunt approaches. The smart structure is modelled using the spectral element method. It is shown that the effective wavenumber present ...
14th WCCM-ECCOMAS Congress, 2021
The study analyzes the dynamic behaviour and vibration attenuation of an Euler Bernoulli beam cou... more The study analyzes the dynamic behaviour and vibration attenuation of an Euler Bernoulli beam coupled with a piezoelectric layer. The vibration attenuation is given by the shunt circuit connected to the piezoelectric. This paper shows different shunt circuit impedances and how they affect the system's frequency response (FRF) functions. The spectral element method is used to model the intelligent material under analysis and has its function based on the exact solution of the wave equation, therefore, a single element is necessary to model the structure. The estimated responses for each shunt configuration express a relationship with the passive components used in the respective circuits. In each case, the circuit has a particular effect on FRFs.
The European Physical Journal Special Topics, 2022
Latin American Journal of Solids and Structures, 2021
Journal of Computational and Nonlinear Dynamics, 2020
The accurate prediction of the dynamic characteristics of a structure is key to successful vibrat... more The accurate prediction of the dynamic characteristics of a structure is key to successful vibration control strategies. A typical vibration and wave propagation control is performed through periodic and shunted piezoelectric patches, also known as a smart material. Therefore, the smart metamaterial considers periodic arrangement of shunted piezoelectric patches providing a beam with attenuation properties which depend on the resonant behaviour of the shunts. The vibration attenuation occurs due to an elastic-electrical system characterized by an internal resonance of the shunt circuit. The spectral element approach provides very accurate solutions for the structural dynamic response. In this paper, a beam-piezoelectric structure is introduced to focus on the control of flexural waves in beams with piezo-layers connected to single and multi resonant shunt approaches. The smart structure is modelled using the spectral element method. It is shown that the effective wavenumber present ...