摘要
耦合模态空间控制方法可以对被控系统的固有频率、阻尼比和模态振型进行配置。针对结构低频振动噪声的主动控制问题,本文采用耦合模态空间控制方法将结构的振动模态控制为零体积速度模态。以矩形简支板为例进行了结构声辐射主动控制仿真,将板的第1阶和第4阶振动模态控制为零体积速度模态,结果表明,简支板的低频声辐射得到了有效控制。本文提出的结构声主动控制方法可以有效控制结构低频振动噪声,同时具有物理意义清楚、控制过程简单、控制率的设计与激励力大小和位置无关等特点。
The dependent modal space control （DMSC） method can be used to control the mode shapes, natural frequencies, and damping ratios in controlled systems. To actively control low-frequency structurally radiated noise, in this study, we used the DMSC method to control the vibration modes of a structure as zero-volume velocity modes. We numerically evaluated the ASAC of a simply supported rectangular plate, using the DMSC method to control the first- and fourth-order vibration modes of the plate at the zero-volume velocity mode. Our simulation re- suits show that we can effectively reduce low-frequency sound radiation from a plate. As such, our proposed structural acoustic control method can effectively reduce low-frequency structurally radiated noise. This method is direct and simple to perform. Also, the control law design is unrelated to the amplitudes and locations of the excitation forces.
作者
白金
黎胜
夏茂龙
BAI Jin LI Sheng XIA Maolong(State Key Laboratory of Structural Analysis for Industrial Equipment, Dalin University of Technology, Dalian 116024, China School of Naval Architecture, Dalian University of Technology, Dalian 116024, China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2017年第9期1385-1390,共6页
Journal of Harbin Engineering University
关键词
结构声主动控制
耦合模态空间控制
零体积速度模态
反馈控制
结构声辐射
声功率
振动模态
声辐射模态
active structural acoustic control
dependent modal space control
zero-volume velocity mode
feedback control
structural acoustic radiation
sound power
vibration mode
radiation mode
