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- W3143480042 abstract "According to the excellent piezoelectric effect and converse piezoelectric effect, this paper designs and fabricates piezoelectric pivot element bars which can accomplish testing-controlling functions, that is, integrate a piezoelectric stack into the element bars playing a major role to form a so-called piezoelectric pivot element bar, and then integrate this piezoelectric pivot element bar into space steel structure thus to realize an intelligent monitoring and vibration control on space steel structure. Based on the above principle, this paper performs shaking table tests on intelligent vibration control for two models of space steel structure with the piezoelectric pivot element bars applied. By respectively inputting an acceleration record of El-Centro earthquake wave and a simple harmonic load, followed by changing the peak acceleration of earthquake wave and the frequency of simple harmonic wave, this paper investigates the influences of such factors on control effectiveness as the size of piezoelectric stack, the stiffness and deformation of model structure, the magnitude and characteristic of external excitation, and excitation voltage etc.. The experimental results indicate that:(1)the size variation of piezoelectric stack in pivot element bar is of little influence on the effectiveness of structural control, (2)when the amplitude of external excitation is big, for a flexible structure the effectiveness of control is rather conspicuous, but when the amplitude of external excitation is comparatively small, the effectiveness of control is relatively obvious for a stiff structure, (3)if the characteristic of external excitation is kept constant, the control effectiveness of pivot element bar over model structures is increasingly obvious with the increase in magnification times of excitation voltage." @default.
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- W3143480042 date "2008-01-01" @default.
- W3143480042 modified "2023-09-27" @default.
- W3143480042 title "The 14th World Conference on Earthquake Engineering" @default.
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