CAJ | 학술논문

应用三维声学有限元法预测亥姆霍兹共振消声器的传递损失，并与实验结果进行对比，两者吻合良好，表明本文所用数值方法的适用性和准确性。一方面，为了在不改变共振器外形的前提下降低共振频率，将连接管延伸至共振腔内部，并详细讨论了延伸长度、延长管横截面形状对共振器声学特性的影响；另一方面，为了拓宽传统亥姆霍兹共振器的消声频带，将共振器进行串并联组合，并详细讨论了组合结构对声学特性的影响。
응용삼유성학유한원법예측해모곽자공진소성기적전체손실，병여실험결과진행대비，량자문합량호，표명본문소용수치방법적괄용성화준학성。일방면，위료재불개변공진기외형적전제하강저공진빈솔，장련접관연신지공진강내부，병상세토론료연신장도、연장관횡절면형상대공진기성학특성적영향；령일방면，위료탁관전통해모곽자공진기적소성빈대，장공진기진행천병련조합，병상세토론료조합결구대성학특성적영향。
The predicted transmission loss of Helmholtz resonator using three-dimensional finite element method and experimental results are compared and showed good agreement, which demonstrated the applicability and accuracy of the finite element numerical method. Then, in order to reduce the resonance frequency without changing the size of resonator, the connecting tube is extended into the volume, and the effect of length and shape of extension on the acoutic performance is discussed in detail;on the other hand, in order to broaden acoustic attenuation of traditional Helmholtz resonator, the volume, connecting tube are combined in parallel or in series, and the effect of which on the acoustic performance is discussed in detail.