负电容压电分流阻尼系统的能量耗散特性  

ENERGY DISSIPATION PERFORMANCE OF A PIEZOELECTRIC SHUNTED SYSTEM WITH NEGATIVE CAPACITANCE

作　　者：张文群[1] 张萌[1] 吴新跃[1] 

机构地区：[1]海军工程大学船舶与动力学院,武汉430033

出　　处：《振动与冲击》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)

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.

关 键 词：压电 负电容 能量耗散因子 机械阻抗 

分 类 号：TB123[理学—工程力学] O482.41[理学—力学]