中国机械工程2018，Vol.29Issue(8)：954-957,964,5.DOI:10.3969/j.issn.1004-132X.2018.08.011
可调频Helmholtz共振器声学性能
Acoustic Performance of Tunable Helmholtz Resonator
摘要
Abstract
Traditional Helmholtz resonators belonged to passive silencer structures,and its acous-tic performances were determined as long as its structures were determined.However,frequency of-ten changed in actual noise environment.In response to this situation,a tunable frequency Helmholtz resonator was proposed.Piezoelectric ceramics which was instead of rigid backplane of the Helmholtz resonator changed the volume of chamber by adj usting the voltage applied to the piezoelectric ceram-ics,thereby distorted the silencer frequency.Experiments show that the piezoelectric ceramic in the applications of 400 V voltage may produce 0.515 mm displacement.Resonant frequency of the Helm-holtz resonator is shifted by 80 Hz at different voltages,and a control program is designed to meet the frequency changing noise environments.关键词
共振器/消声/压电陶瓷/共振频率Key words
Helmholtz resonator/noise suppression/piezoelectric ceramics/resonant frequency分类
通用工业技术引用本文复制引用
安君,吕海峰,耿彦章,韩彦南..可调频Helmholtz共振器声学性能[J].中国机械工程,2018,29(8):954-957,964,5.基金项目
国家自然科学基金资助项目(51305409) （51305409）
山西省青年科技研究基金资助项目(2013021020-2) （2013021020-2）
