摘要
在半主动压电分流阻尼技术中,采用不同结构负电容分支电路时,系统具有不同的阻尼特性。将负电容半主动分支网络分为串联电容/电阻支路、串联电容/电感/电阻支路、并联电容/电阻支路,获得了不同支路时系统的机械阻抗,比较分析了系统能量耗散因子及刚度比,发现串联电容/电感/电阻支路能获得更宽更高的中低频阻尼性能,而并联电容/电阻支路的高频阻尼性能较好。
With semi-active piezoelectric shunted damping technology,when different structures of negative capacitance shunted circuits are used,the system damping is different.Semi-active shunted circuits with negative capacitance are discussed including three forms: series negative-capacitance resistance;series negative-capacitance resistance and inductive;parallel negative-capacitance resistance.With a energy dissipation model,the energy dissipation factor and the stiffness ratio of different shunted configurations are analyzed and compared.The series negative-capacitance,resistance and inductive shunted system has higher damping performance at lower frequencies with a broader band,while the damping performance of the parallel negative-capacitance resistance shunted system is better at high frequencies.
出处
《振动与冲击》
EI
CSCD
北大核心
2008年第10期70-74,共5页
Journal of Vibration and Shock
基金
国家自然科学基金项目(50605062)
中国博士后科学基金项目(20070410928)
关键词
压电
负电容
能量耗散因子
机械阻抗
piezoelectric
negative capacitance
energy dissipation factor
mechanical impedance
