次声管道降噪滤波器优化设计

提出了基于声学响应模型与群差分进化算法的次声管道降噪滤波器优化设计方法,在理想条件和工程实践两种情景下设计了管道滤波器的结构参数并仿真分析了降噪性能表现。结果表明:（1）理想条件下的设计结果在约0.1～0.8 Hz的频带内取得了5 dB以上的降噪性能提升,最大提升达到12 dB。（2）工程实践情景的设计结果在各种环境风速中最大可以取得约3dB的性能提升。（3）大风速条件的优化设计可应用于环境风速未知或变化较大的场景。分析结果表明所提设计方法可以有效设计管道滤波器,优化设计的管道滤波器在降噪性能上优于传统管道滤波器。 

Optimization design of infrasound noise reduction pipe arrays

A design method of infrasound noise reduction pipe arrays based on acoustic response model and swarm differential evolution algorithm is proposed.The constructive parameters are redesigned under ideal and engineering practice scenarios,and the noise reduction performances are simulated and analyzed.The simulation shows that(1) the pipe array redesigned under ideal condition achieves a noise reduction improvement of more than 5 dB in the frequency band of about 0.1~0.8 Hz,with a maximum improvement of 12 dB;(2) the pipe array redesigned under engineering practice scenario achieves a performance improvement of about 3 dB at the maximum in various ambient wind speeds;(3) the constructive parameters redesigned under high wind speed condition can be applied to scenarios where the ambient wind speed is unknown or changes greatly.The results show the effectiveness of the proposed method and the better noise reduction performance of the redesigned pipe array.