发明名称 |
Multi-mode vibration damping device and method using negative capacitance shunt circuits |
摘要 |
A novel multi-mode vibration damper is invented by using a pair of piezoelectric patches connected with negative capacitance shunt circuit units. A piezoelectric material connected with a series resistor-negative capacitor branch circuit is capable of suppressing the vibration and/or noise amplitudes in the low frequency range. The other piezoelectric material connected with a parallel resistor-negative capacitor circuit is for suppressing the vibration and/or noise amplitudes in the high frequency range. By combining two negative capacitance shunt circuit units, a multi-mode vibration damper is capable of suppressing the whole structure modes simultaneously. In order to describe the characteristic behaviors of a multi-mode vibration damper, the stiffness ratio and loss factor with respect to the non-dimensional frequency are considered. The mechanism of a shunt damper is also described as considering a shunt voltage generated by the shunt impedance. The example results show that the multi-mode vibration damper reduces the vibration amplitudes of the vibrating system significantly across a broadband frequency range.
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申请公布号 |
US2003209953(A1) |
申请公布日期 |
2003.11.13 |
申请号 |
US20030428782 |
申请日期 |
2003.05.05 |
申请人 |
POHANG UNIVERSITY OF SCIENCE AND TECHNOLOGY FOUNDATION |
发明人 |
PARK CHUL-HUE |
分类号 |
F16F15/00;H01L41/04;(IPC1-7):H01L41/09 |
主分类号 |
F16F15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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