CAJ | 학술논문

针对声管固定方法对微环音气流压电发电机最大输入功率的影响，提出了应用有限元和间边界元相结合的方法，对不同固定方法下的声管，数值模拟腔体受谐波(正弦波)激励的振动响应。在满足压电换能器最大机械功率条件下，选择合适的声管固定方法。结果表明：结构尺寸一定时，固支-固支固定有利于提高固有频率；结构尺寸越小，不同固定方法所对应的固有频率差异越大；固支-固支固定下，声管的基频较高且其偏差影响小。不同固定方法和不同尺寸下声管的谐响应和基频变化趋势，为微环音气流压电发电机的设计提供参考，也为进一步的换能器设计和验证实验提供了依据。
침대성관고정방법대미배음기류압전발전궤최대수입공솔적영향，제출료응용유한원화간변계원상결합적방법，대불동고정방법하적성관，수치모의강체수해파(정현파)격려적진동향응。재만족압전환능기최대궤계공솔조건하，선택합괄적성관고정방법。결과표명：결구척촌일정시，고지-고지고정유리우제고고유빈솔；결구척촌월소，불동고정방법소대응적고유빈솔차이월대；고지-고지고정하，성관적기빈교고차기편차영향소。불동고정방법화불동척촌하성관적해향응화기빈변화추세，위미배음기류압전발전궤적설계제공삼고，야위진일보적환능기설계화험증실험제공료의거。
Methods of sound tube fixation the have great effect on the input power of micro-ringtone airflow piezoelectric generator.A finite element method combined with indirect boundary element method was proposed, harmonic responses of the sound tube with various fixation methods were analyzed.To maximize mechanical power of piezoelectric transducer,it should be choosing proper fixation methods of the sound tube.The result showed that:for the given structure size,clamped-clamped fixation method was beneficial to improve the natural frequency;the smaller size,the greater difference of natural frequency corresponded to various fixation meth-ods;clamped-clamped sound tube possessed higher fundamental frequency,and its deviation was small.The harmonic response and trend of fundamental frequency of sound tube with various fixing boundaries and different diameters could provide valuable reference for the design of micro-ringtone airflow piezoelectric generator;and it also provided the basis for further the design of transducer and experimental verification.