三角截面内管的阻抗复合消声器声学特性研究  

Study on Acoustic Characteristics of the Impedance Composite Muffler with a Triangular Cross-section Inner Tube

作　　者：黄逸哲 蔡敢为[1] 李霖[2] 李善德[2] HUANG Yi-zhe;CAI Gan-wei;LI Lin;LI Shan-de(Mechanical Engineering College, Guangxi University, Nanning 530004, China;School of Mechanical Science and Engineering, Huazhong University of Science and Technology,Wuhan 430074, China)

机构地区：[1]广西大学机械工程学院,南宁530004 [2]华中科技大学机械科学与工程学院,武汉430074

出　　处：《噪声与振动控制》2016年第4期178-182,共5页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(51575201)

摘　　要：以三角截面内管阻抗复合型消声器为研究对象,推导其消声量数学表达式,基于GT-POWER软件建立消声器传递损失和阻力损失计算仿真模型,分析消声器结构、材料参数与消声性能的关系,得到孔径、穿孔率、变径管倾角、吸声材料及容重对消声器传递损失及背压的影响规律,并通过实验验证仿真结果的正确性。研究结果可为具有三角截面消声器的设计和优化提供参考。An impedance composite muffler with a triangular cross- section inner tube is studied. Mathematical expressions for noise elimination of the muffler are derived. Based on the GT-POWER software, the models of transmission loss and resistance loss of the muffler are established. By analyzing the relationship of muffler structure, material parameters and the acoustic performance of the muffler, the influence of aperture, perforation rate, inclined angle of the reducing pipe,parameters of the sound-absorbing materials and bulk density on the transmission loss and back pressure is obtained. The simulation results are verified by experiment. This work has provided a reference for design and optimization of mufflers with the triangular section inner tubes.

关 键 词：声学 阻抗复合消声器 三角截面管 声学特性 传递损失 

分 类 号：TB535[理学—物理] TB132[理学—声学]