摘要
为了改进管道中高阶模式声波的有源控制效果,研究了壁面分布次级声源的空间分布优化问题。首先提出管道中次级声源独立控制高阶模式声波的理论模型。然后推导次级声源在管道中各方向上空间分布对控制高阶模式声波的贡献,得到了次级声源空间分布的优化准则。通过将空间分布离散化,采用最小化管道中声能流的控制策略得到次级声源的最优驱动强度。最后通过数值仿真对比最优驱动强度时各种次级声源空间分布对控制性能的影响,验证了通过优化次级声源空间分布能显著提高控制效果。仿真结果表明,当次级声源分布于管道所有壁面且沿管道轴向分布范围较大时,高阶模式的控制效率最高。
The optimization of the spatial distribution of boundary-located secondary sources is studied to improve the control performance on the higher-order modes in ducts.At first,the theoretical model of the secondary sources generating higher-order modes in ducts is proposed.Then the contribution of boundarylocated secondary sources distributed in each direction is analytically derived,which provides the guidance for optimizing the secondary source distribution.The source distribution is discretized and the source strengths are obtained by minimizing acoustic power flow in the duct.Finally,the control performances achieved by various source distributions with optimal source strengths are compared to illustrate that the control performances can be significantly improved by optimizing the source distribution.The simulation results show that the boundary-located secondary sources should be located around all the duct walls and spread out along the axial direction to get the best control performance.
作者
罗平展
张芳杰
徐健
李晓东
LUO Pingzhan;ZHANG Fangjie;XU Jian;LI Xiaodong(Key Laboratory of Noise and Vibration Research,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《应用声学》
CSCD
北大核心
2022年第5期776-784,共9页
Journal of Applied Acoustics
关键词
有源噪声控制
高阶模式声波
壁面分布次级声源
空间分布
Active noise control
Higher-order modes
Boundary-located secondary sources
Spatial distribution
