非線形圧電性を考慮した圧電型スマート制振板の性能解析

抄録

The conventional analytic way based on the linear piezoelectricity cannot reproduce the frequency response of the piezoelectric smart damping structure connected to the self-sensing synchronized switch damping on inductor (SSDI) technique. Firstly, necessity for incorporating the nonlinear piezoelectricity into the model was discussed, using the stressstrain properties, and the polarization- and strain-electric field loop of the piezoelectric materials. After the discussion, a new calculation methodology was proposed in order to predict the electromechanical properties for such a smart structure. A new governing electromechanical equation was derived based on the nonlinear piezoelectricity. The harmonic balance method (HBM) and the nonlinear optimization method was employed in order to determine the nonlinear parameters. After deriving the governing equation, the two-way coupled simulation technique, which can simulate real performance of the piezoelectric smart damping structure connected to the self-sensing SSDI circuit, was developed. The proposed calculation methodology and technique will allow us to simulate and predict the electromechanical properties for the piezoelectric smart device.