亥姆霍兹共振消声器的声学改进  

Research of acoustically improved Helmholtz resonator

作　　者：苏胜利[1] 张苗[1] 曹为午[1] 

机构地区：[1]武汉第二船舶设计研究所,湖北武汉430064

出　　处：《舰船科学技术》2014年第11期128-131,共4页Ship Science and Technology

摘　　要：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。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.

关 键 词：声学 亥姆霍兹 消声器 有限元 

分 类 号：TB535[理学—物理]