半被动多层压电吸声技术及其电路模型  

Semi-passive Multiple Patches Piezoelectric Sound Absorption Technology and Its Electrical Equivalent Model

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,湖北武汉430033

出　　处：《压电与声光》2009年第3期433-436,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(50605062);中国博士后科学基金资助项目(20070410928)

摘　　要：提出了一种吸声新技术——半被动压电吸声技术,并对其进行了等效电路模型分析。该吸声结构采用在压电片电极两端串联负电容、电感和电阻分支电路,利用这种半被动结构中低频能量损耗因子较高及带宽较大的优良性能,构成新的压电吸声结构,建立了多层吸声结构的梅森等效电路模型,对其吸声系数等进行了数值模拟,表明其具有优良的宽带中低频吸声性能。A novel sound absorption technology, semi-passive piezoelectric sound absorption, is presented and its performance is analyzed used electrical equivalent model in this paper. Series negative capacitance, inductance and resistance shunted circuits between the poles of the piezoelectric patch is adopted in the sound absorption structure. Its higher energy dissipation factor and broader wideband in middle and low frequencies is fitted to sound absorption, so a novel piezoelectric sound absorption structure is established. Mason electrical equivalent model of this multiple patches structure is built, and its sound absorption coefficient is obtained by numerical simulation. This novel teehnonlgy shows a better broadband sound absorption performance at low and middle frequencies.

关 键 词：压电分流阻尼 吸声 半被动 负电容 

分 类 号：TU112.42[建筑科学—建筑理论]