摘要
以简支矩形板为例,利用时域声辐射模态进行噪声的结构优化控制。已有研究表明时域辐射模态能独立地辐射声功率,并且振动结构辐射的声功率主要由第一阶辐射模态的声功率决定。在此基础上进行简支板辐射噪声的结构优化控制,并对最优控制力源的位置进行了讨论和分析。最后设计自适应前馈控制系统对控制效果进行仿真验证。
Structural optimization for radiation noise control of a simply supported plate is carried out using the time domain radiation modes. Recent study shows that these radiation modes in the time domain can radiate sound power individually, and the first order radiation mode is the dominant one. Based on these findings the design of Active Structureal Acoustic Control system is presented to cancel the first radiation mode＇s amplitude by filter x-LMS algorithm. And the optimization of arrangement of controlling force sources is analyzed and discussed. Finally, the validity of the proposed method is verified by a numerical example.
出处
《噪声与振动控制》
CSCD
北大核心
2009年第5期126-130,共5页
Noise and Vibration Control
关键词
声学
噪声
时域辐射模态
主动控制
仿真
acoustics
noise
time-domain radiation mode
active control
simulation
